添加虚拟环境中的扩展包

DAPlatform/app.py

 from flask import Flask
 from flask_cors import CORS
 
-from dao import Image
-
 # from views.uploadDownload import uploadDownload
 # from views.textAnnotation import textAnnotation
 from views.user import user
 from views.task import task
 from views.slice import slice
-from views.imageAnnotation import image
+# from views.imageAnnotation import image
 
 from config.config import DevelopmentConfig
 
@@ -16,14 +14,14 @@ app = Flask(__name__)
 CORS(app)
 app.config.from_object(DevelopmentConfig)
 
-Image.db.init_app(app)
+# Image.db.init_app(app)
 
 # app.register_blueprint(textAnnotation)
 # app.register_blueprint(uploadDownload)
 app.register_blueprint(user)
 app.register_blueprint(task)
 app.register_blueprint(slice)
-app.register_blueprint(image)
+# app.register_blueprint(image)
 
 if __name__ == '__main__':
     app.run(debug=True, host='127.0.0.1', port=9100)

DAPlatform/requirements.txt

-alabaster==0.7.11
-anaconda-client==1.7.2
-anaconda-navigator==1.9.2
-anaconda-project==0.8.2
-appdirs==1.4.3
-asn1crypto==0.24.0
-astroid==2.0.4
-astropy==3.0.4
-atomicwrites==1.2.1
-attrs==18.2.0
-Automat==0.7.0
-Babel==2.6.0
-backcall==0.1.0
-backports.shutil-get-terminal-size==1.0.0
-beautifulsoup4==4.6.3
-bitarray==0.8.3
-bkcharts==0.2
-blaze==0.11.3
-bleach==2.1.4
-bokeh==0.13.0
-boto==2.49.0
-Bottleneck==1.2.1
-certifi==2018.8.24
-cffi==1.11.5
-chardet==3.0.4
-click==6.7
-cloudpickle==0.5.5
-clyent==1.2.2
-colorama==0.3.9
-comtypes==1.1.7
-conda==4.5.11
-conda-build==3.15.1
-constantly==15.1.0
-contextlib2==0.5.5
-cryptography==2.3.1
-cycler==0.10.0
-Cython==0.28.5
-cytoolz==0.9.0.1
-dask==0.19.1
-datashape==0.5.4
-decorator==4.3.0
-defusedxml==0.5.0
-distributed==1.23.1
-docutils==0.14
-entrypoints==0.2.3
-et-xmlfile==1.0.1
-fastcache==1.0.2
-filelock==3.0.8
+Werkzeug==0.14.1
+pymongo==3.9.0
+Flask_Cors==3.0.8
 Flask==1.0.2
-Flask-Cors==3.0.8
-flask-mongoengine==0.9.5
-Flask-WTF==0.14.3
-gevent==1.3.6
-glob2==0.6
-greenlet==0.4.15
-h5py==2.8.0
-heapdict==1.0.0
-html5lib==1.0.1
-hyperlink==18.0.0
-idna==2.7
-imageio==2.4.1
-imagesize==1.1.0
-importlib-metadata==0.23
-incremental==17.5.0
-ipykernel==4.10.0
-ipython==6.5.0
-ipython-genutils==0.2.0
-ipywidgets==7.4.1
-isort==4.3.4
-itsdangerous==0.24
-jdcal==1.4
-jedi==0.12.1
-Jinja2==2.10
-jsonschema==2.6.0
-jupyter==1.0.0
-jupyter-client==5.2.3
-jupyter-console==5.2.0
-jupyter-core==4.4.0
-jupyterlab==0.34.9
-jupyterlab-launcher==0.13.1
-Keras==2.2.4
-Keras-Applications==1.0.7
-Keras-Preprocessing==1.0.9
-keyring==13.2.1
-kiwisolver==1.0.1
-lazy-object-proxy==1.3.1
-llvmlite==0.24.0
-locket==0.2.0
-lxml==4.2.5
-MarkupSafe==1.0
-matplotlib==2.2.3
-mccabe==0.6.1
-menuinst==1.4.14
-mistune==0.8.3
-mkl-fft==1.0.4
-mkl-random==1.0.1
-mongoengine==0.20.0
-more-itertools==4.3.0
-mpmath==1.0.0
-msgpack==0.5.6
-multipledispatch==0.6.0
-mysql==0.0.2
-mysqlclient==1.4.6
-navigator-updater==0.2.1
-nbconvert==5.4.0
-nbformat==4.4.0
-networkx==2.1
-nltk==3.3
-nose==1.3.7
-notebook==5.6.0
-numba==0.39.0
-numexpr==2.6.8
-numpy==1.15.1
-numpydoc==0.8.0
-odo==0.5.1
-olefile==0.46
-opencv-contrib-python==4.1.0.25
-opencv-python==4.1.0.25
-openpyxl==2.5.6
-packaging==17.1
-pandas==0.23.4
-pandocfilters==1.4.2
-parso==0.3.1
-partd==0.3.8
-path.py==11.1.0
-pathlib2==2.3.2
-patsy==0.5.0
 peewee==3.13.3
-pep8==1.7.1
-pickleshare==0.7.4
-Pillow==5.2.0
-pkginfo==1.4.2
-pluggy==0.13.0
-ply==3.11
-prometheus-client==0.3.1
-prompt-toolkit==1.0.15
-psutil==5.4.7
-py==1.6.0
-pyasn1==0.4.4
-pyasn1-modules==0.2.2
-pycodestyle==2.4.0
-pycosat==0.6.3
-pycparser==2.18
-pycrypto==2.6.1
-pycurl==7.43.0.2
-pyflakes==2.0.0
-Pygments==2.2.0
-pylint==2.1.1
-pymongo==3.10.1
-PyMySQL==0.9.3
-pyodbc==4.0.24
-pyOpenSSL==18.0.0
-pyparsing==2.2.0
-PySocks==1.6.8
-pytest==5.2.2
-pytest-arraydiff==0.2
-pytest-astropy==0.4.0
-pytest-doctestplus==0.1.3
-pytest-openfiles==0.3.0
-pytest-remotedata==0.3.0
-python-dateutil==2.7.3
-pytz==2018.5
-PyWavelets==1.0.0
-pywin32==223
-pywinpty==0.5.4
-PyYAML==3.13
-pyzmq==17.1.2
-QtAwesome==0.4.4
-qtconsole==4.4.1
-QtPy==1.5.0
-requests==2.19.1
-rope==0.11.0
-ruamel-yaml==0.15.46
-scikit-image==0.14.0
-scikit-learn==0.19.2
-scipy==1.1.0
-seaborn==0.9.0
-Send2Trash==1.5.0
-service-identity==17.0.0
-simplegeneric==0.8.1
-singledispatch==3.4.0.3
-six==1.11.0
-sklearn==0.0
-snowballstemmer==1.2.1
-sortedcollections==1.0.1
-sortedcontainers==2.0.5
-Sphinx==1.7.9
-sphinxcontrib-websupport==1.1.0
-spyder==3.3.1
-spyder-kernels==0.2.6
-SQLAlchemy==1.2.11
-statsmodels==0.9.0
-sympy==1.1.1
-tables==3.4.4
-tblib==1.3.2
-terminado==0.8.1
-testpath==0.3.1
-toolz==0.9.0
-tornado==5.1
-tqdm==4.26.0
-traitlets==4.3.2
-Twisted==18.7.0
-unicodecsv==0.14.1
-urllib3==1.23
-wcwidth==0.1.7
-webencodings==0.5.1
-Werkzeug==0.14.1
-widgetsnbextension==3.4.1
-win-inet-pton==1.0.1
-win-unicode-console==0.5
-wincertstore==0.2
-wrapt==1.10.11
-WTForms==2.3.1
-xlrd==1.1.0
-XlsxWriter==1.1.0
-xlwings==0.11.8
-xlwt==1.3.0
-zict==0.1.3
-zipp==0.6.0
-zope.interface==4.5.0
+dao==0.1.3
+flask_mongoengine==0.9.5

DAPlatform/venv/Lib/site-packages/bson/__init__.py

@@ -1166,7 +1166,7 @@ def decode_file_iter(file_obj, codec_options=DEFAULT_CODEC_OPTIONS):
         elif len(size_data) != 4:
             raise InvalidBSON("cut off in middle of objsize")
         obj_size = _UNPACK_INT_FROM(size_data, 0)[0] - 4
-        elements = size_data + file_obj.read(max(0, obj_size))
+        elements = size_data + file_obj.read(obj_size)
         yield _bson_to_dict(elements, codec_options)
 
 

DAPlatform/venv/Lib/site-packages/bson/json_util.py

@@ -699,7 +699,7 @@ def _parse_canonical_decimal128(doc):
 
 def _parse_canonical_minkey(doc):
     """Decode a JSON MinKey to bson.min_key.MinKey."""
-    if type(doc['$minKey']) is not int or doc['$minKey'] != 1:
+    if doc['$minKey'] is not 1:
         raise TypeError('$minKey value must be 1: %s' % (doc,))
     if len(doc) != 1:
         raise TypeError('Bad $minKey, extra field(s): %s' % (doc,))
@@ -708,7 +708,7 @@ def _parse_canonical_minkey(doc):
 
 def _parse_canonical_maxkey(doc):
     """Decode a JSON MaxKey to bson.max_key.MaxKey."""
-    if type(doc['$maxKey']) is not int or doc['$maxKey'] != 1:
+    if doc['$maxKey'] is not 1:
         raise TypeError('$maxKey value must be 1: %s', (doc,))
     if len(doc) != 1:
         raise TypeError('Bad $minKey, extra field(s): %s' % (doc,))

DAPlatform/venv/Lib/site-packages/bson/raw_bson.py

@@ -45,8 +45,7 @@ class RawBSONDocument(abc.Mapping):
         class from the standard library so it can be used like a read-only
         ``dict``::
 
-            >>> from bson import encode
-            >>> raw_doc = RawBSONDocument(encode({'_id': 'my_doc'}))
+            >>> raw_doc = RawBSONDocument(BSON.encode({'_id': 'my_doc'}))
             >>> raw_doc.raw
             b'...'
             >>> raw_doc['_id']

DAPlatform/venv/Lib/site-packages/pymongo-3.10.1.dist-info/INSTALLER

-pip

DAPlatform/venv/Lib/site-packages/pymongo-3.10.1.dist-info/METADATA

-Metadata-Version: 2.1
-Name: pymongo
-Version: 3.10.1
-Summary: Python driver for MongoDB <http://www.mongodb.org>
-Home-page: http://github.com/mongodb/mongo-python-driver
-Author: Mike Dirolf
-Author-email: mongodb-user@googlegroups.com
-Maintainer: Bernie Hackett
-Maintainer-email: bernie@mongodb.com
-License: Apache License, Version 2.0
-Keywords: mongo,mongodb,pymongo,gridfs,bson
-Platform: UNKNOWN
-Classifier: Development Status :: 5 - Production/Stable
-Classifier: Intended Audience :: Developers
-Classifier: License :: OSI Approved :: Apache Software License
-Classifier: Operating System :: MacOS :: MacOS X
-Classifier: Operating System :: Microsoft :: Windows
-Classifier: Operating System :: POSIX
-Classifier: Programming Language :: Python :: 2
-Classifier: Programming Language :: Python :: 2.7
-Classifier: Programming Language :: Python :: 3
-Classifier: Programming Language :: Python :: 3.4
-Classifier: Programming Language :: Python :: 3.5
-Classifier: Programming Language :: Python :: 3.6
-Classifier: Programming Language :: Python :: 3.7
-Classifier: Programming Language :: Python :: 3.8
-Classifier: Programming Language :: Python :: Implementation :: CPython
-Classifier: Programming Language :: Python :: Implementation :: PyPy
-Classifier: Topic :: Database
-Requires-Python: >=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*
-Provides-Extra: encryption
-Requires-Dist: pymongocrypt (<2.0.0) ; extra == 'encryption'
-Provides-Extra: gssapi
-Requires-Dist: winkerberos (>=0.5.0) ; extra == 'gssapi'
-Provides-Extra: snappy
-Requires-Dist: python-snappy ; extra == 'snappy'
-Provides-Extra: srv
-Requires-Dist: dnspython (<2.0.0,>=1.16.0) ; extra == 'srv'
-Provides-Extra: tls
-Provides-Extra: zstd
-Requires-Dist: zstandard ; extra == 'zstd'
-
-=======
-PyMongo
-=======
-:Info: See `the mongo site <http://www.mongodb.org>`_ for more information. See `GitHub <http://github.com/mongodb/mongo-python-driver>`_ for the latest source.
-:Author: Mike Dirolf
-:Maintainer: Bernie Hackett <bernie@mongodb.com>
-
-About
-=====
-
-The PyMongo distribution contains tools for interacting with MongoDB
-database from Python.  The ``bson`` package is an implementation of
-the `BSON format <http://bsonspec.org>`_ for Python. The ``pymongo``
-package is a native Python driver for MongoDB. The ``gridfs`` package
-is a `gridfs
-<http://www.mongodb.org/display/DOCS/GridFS+Specification>`_
-implementation on top of ``pymongo``.
-
-PyMongo supports MongoDB 2.6, 3.0, 3.2, 3.4, 3.6, 4.0 and 4.2.
-
-Support / Feedback
-==================
-
-For issues with, questions about, or feedback for PyMongo, please look into
-our `support channels <http://www.mongodb.org/about/support>`_. Please
-do not email any of the PyMongo developers directly with issues or
-questions - you're more likely to get an answer on the `mongodb-user
-<http://groups.google.com/group/mongodb-user>`_ list on Google Groups.
-
-Bugs / Feature Requests
-=======================
-
-Think you’ve found a bug? Want to see a new feature in PyMongo? Please open a
-case in our issue management tool, JIRA:
-
-- `Create an account and login <https://jira.mongodb.org>`_.
-- Navigate to `the PYTHON project <https://jira.mongodb.org/browse/PYTHON>`_.
-- Click **Create Issue** - Please provide as much information as possible about the issue type and how to reproduce it.
-
-Bug reports in JIRA for all driver projects (i.e. PYTHON, CSHARP, JAVA) and the
-Core Server (i.e. SERVER) project are **public**.
-
-How To Ask For Help
--------------------
-
-Please include all of the following information when opening an issue:
-
-- Detailed steps to reproduce the problem, including full traceback, if possible.
-- The exact python version used, with patch level::
-
-  $ python -c "import sys; print(sys.version)"
-
-- The exact version of PyMongo used, with patch level::
-
-  $ python -c "import pymongo; print(pymongo.version); print(pymongo.has_c())"
-
-- The operating system and version (e.g. Windows 7, OSX 10.8, ...)
-- Web framework or asynchronous network library used, if any, with version (e.g.
-  Django 1.7, mod_wsgi 4.3.0, gevent 1.0.1, Tornado 4.0.2, ...)
-
-Security Vulnerabilities
-------------------------
-
-If you’ve identified a security vulnerability in a driver or any other
-MongoDB project, please report it according to the `instructions here
-<http://docs.mongodb.org/manual/tutorial/create-a-vulnerability-report>`_.
-
-Installation
-============
-
-PyMongo can be installed with `pip <http://pypi.python.org/pypi/pip>`_::
-
-  $ python -m pip install pymongo
-
-Or ``easy_install`` from
-`setuptools <http://pypi.python.org/pypi/setuptools>`_::
-
-  $ python -m easy_install pymongo
-
-You can also download the project source and do::
-
-  $ python setup.py install
-
-Do **not** install the "bson" package from pypi. PyMongo comes with its own
-bson package; doing "easy_install bson" installs a third-party package that
-is incompatible with PyMongo.
-
-Dependencies
-============
-
-PyMongo supports CPython 2.7, 3.4+, PyPy, and PyPy3.5+.
-
-Optional dependencies:
-
-GSSAPI authentication requires `pykerberos
-<https://pypi.python.org/pypi/pykerberos>`_ on Unix or `WinKerberos
-<https://pypi.python.org/pypi/winkerberos>`_ on Windows. The correct
-dependency can be installed automatically along with PyMongo::
-
-  $ python -m pip install pymongo[gssapi]
-
-Support for mongodb+srv:// URIs requires `dnspython
-<https://pypi.python.org/pypi/dnspython>`_::
-
-  $ python -m pip install pymongo[srv]
-
-TLS / SSL support may require `ipaddress
-<https://pypi.python.org/pypi/ipaddress>`_ and `certifi
-<https://pypi.python.org/pypi/certifi>`_ or `wincertstore
-<https://pypi.python.org/pypi/wincertstore>`_ depending on the Python
-version in use. The necessary dependencies can be installed along with
-PyMongo::
-
-  $ python -m pip install pymongo[tls]
-
-Wire protocol compression with snappy requires `python-snappy
-<https://pypi.org/project/python-snappy>`_::
-
-  $ python -m pip install pymongo[snappy]
-
-Wire protocol compression with zstandard requires `zstandard
-<https://pypi.org/project/zstandard>`_::
-
-  $ python -m pip install pymongo[zstd]
-
-You can install all dependencies automatically with the following
-command::
-
-  $ python -m pip install pymongo[snappy,gssapi,srv,tls,zstd]
-
-Other optional packages:
-
-- `backports.pbkdf2 <https://pypi.python.org/pypi/backports.pbkdf2/>`_,
-  improves authentication performance with SCRAM-SHA-1 and SCRAM-SHA-256.
-  It especially improves performance on Python versions older than 2.7.8.
-- `monotonic <https://pypi.python.org/pypi/monotonic>`_ adds support for
-  a monotonic clock, which improves reliability in environments
-  where clock adjustments are frequent. Not needed in Python 3.
-
-
-Additional dependencies are:
-
-- (to generate documentation) sphinx_
-
-Examples
-========
-Here's a basic example (for more see the *examples* section of the docs):
-
-.. code-block:: python
-
-  >>> import pymongo
-  >>> client = pymongo.MongoClient("localhost", 27017)
-  >>> db = client.test
-  >>> db.name
-  u'test'
-  >>> db.my_collection
-  Collection(Database(MongoClient('localhost', 27017), u'test'), u'my_collection')
-  >>> db.my_collection.insert_one({"x": 10}).inserted_id
-  ObjectId('4aba15ebe23f6b53b0000000')
-  >>> db.my_collection.insert_one({"x": 8}).inserted_id
-  ObjectId('4aba160ee23f6b543e000000')
-  >>> db.my_collection.insert_one({"x": 11}).inserted_id
-  ObjectId('4aba160ee23f6b543e000002')
-  >>> db.my_collection.find_one()
-  {u'x': 10, u'_id': ObjectId('4aba15ebe23f6b53b0000000')}
-  >>> for item in db.my_collection.find():
-  ...     print(item["x"])
-  ...
-  10
-  8
-  11
-  >>> db.my_collection.create_index("x")
-  u'x_1'
-  >>> for item in db.my_collection.find().sort("x", pymongo.ASCENDING):
-  ...     print(item["x"])
-  ...
-  8
-  10
-  11
-  >>> [item["x"] for item in db.my_collection.find().limit(2).skip(1)]
-  [8, 11]
-
-Documentation
-=============
-
-You will need sphinx_ installed to generate the
-documentation. Documentation can be generated by running **python
-setup.py doc**. Generated documentation can be found in the
-*doc/build/html/* directory.
-
-Testing
-=======
-
-The easiest way to run the tests is to run **python setup.py test** in
-the root of the distribution.
-
-To verify that PyMongo works with Gevent's monkey-patching::
-
-    $ python green_framework_test.py gevent
-
-Or with Eventlet's::
-
-    $ python green_framework_test.py eventlet
-
-.. _sphinx: http://sphinx.pocoo.org/
-
-

DAPlatform/venv/Lib/site-packages/pymongo-3.10.1.dist-info/RECORD

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DAPlatform/venv/Lib/site-packages/pymongo-3.10.1.dist-info/WHEEL

-Wheel-Version: 1.0
-Generator: bdist_wheel (0.33.6)
-Root-Is-Purelib: false
-Tag: cp37-cp37m-win_amd64
-

DAPlatform/venv/Lib/site-packages/pymongo-3.10.1.dist-info/top_level.txt

-bson
-gridfs
-pymongo

DAPlatform/venv/Lib/site-packages/pymongo/__init__.py

@@ -64,7 +64,7 @@ SLOW_ONLY = 1
 ALL = 2
 """Profile all operations."""
 
-version_tuple = (3, 10, 1)
+version_tuple = (3, 9, 0)
 
 def get_version_string():
     if isinstance(version_tuple[-1], str):

DAPlatform/venv/Lib/site-packages/pymongo/client_session.py

@@ -95,7 +95,6 @@ Classes
 """
 
 import collections
-import os
 import sys
 import uuid
 
@@ -268,7 +267,7 @@ class _TransactionContext(object):
         return self
 
     def __exit__(self, exc_type, exc_val, exc_tb):
-        if self.__session.in_transaction:
+        if self.__session._in_transaction:
             if exc_val is None:
                 self.__session.commit_transaction()
             else:
@@ -357,7 +356,7 @@ class ClientSession(object):
     def _end_session(self, lock):
         if self._server_session is not None:
             try:
-                if self.in_transaction:
+                if self._in_transaction:
                     self.abort_transaction()
             finally:
                 self._client._return_server_session(self._server_session, lock)
@@ -506,7 +505,7 @@ class ClientSession(object):
             try:
                 ret = callback(self)
             except Exception as exc:
-                if self.in_transaction:
+                if self._in_transaction:
                     self.abort_transaction()
                 if (isinstance(exc, PyMongoError) and
                         exc.has_error_label("TransientTransactionError") and
@@ -515,7 +514,8 @@ class ClientSession(object):
                     continue
                 raise
 
-            if not self.in_transaction:
+            if self._transaction.state in (
+                    _TxnState.NONE, _TxnState.COMMITTED, _TxnState.ABORTED):
                 # Assume callback intentionally ended the transaction.
                 return ret
 
@@ -551,7 +551,7 @@ class ClientSession(object):
         """
         self._check_ended()
 
-        if self.in_transaction:
+        if self._in_transaction:
             raise InvalidOperation("Transaction already in progress")
 
         read_concern = self._inherit_option("read_concern", read_concern)
@@ -589,7 +589,7 @@ class ClientSession(object):
                 "Cannot call commitTransaction after calling abortTransaction")
         elif state is _TxnState.COMMITTED:
             # We're explicitly retrying the commit, move the state back to
-            # "in progress" so that in_transaction returns true.
+            # "in progress" so that _in_transaction returns true.
             self._transaction.state = _TxnState.IN_PROGRESS
             retry = True
 
@@ -750,7 +750,7 @@ class ClientSession(object):
         """Process a response to a command that was run with this session."""
         self._advance_cluster_time(reply.get('$clusterTime'))
         self._advance_operation_time(reply.get('operationTime'))
-        if self.in_transaction and self._transaction.sharded:
+        if self._in_transaction and self._transaction.sharded:
             recovery_token = reply.get('recoveryToken')
             if recovery_token:
                 self._transaction.recovery_token = recovery_token
@@ -761,11 +761,8 @@ class ClientSession(object):
         return self._server_session is None
 
     @property
-    def in_transaction(self):
-        """True if this session has an active multi-statement transaction.
-
-        .. versionadded:: 3.10
-        """
+    def _in_transaction(self):
+        """True if this session has an active multi-statement transaction."""
         return self._transaction.active()
 
     @property
@@ -786,7 +783,7 @@ class ClientSession(object):
 
     def _txn_read_preference(self):
         """Return read preference of this transaction or None."""
-        if self.in_transaction:
+        if self._in_transaction:
             return self._transaction.opts.read_preference
         return None
 
@@ -796,14 +793,14 @@ class ClientSession(object):
         self._server_session.last_use = monotonic.time()
         command['lsid'] = self._server_session.session_id
 
-        if not self.in_transaction:
+        if not self._in_transaction:
             self._transaction.reset()
 
         if is_retryable:
             command['txnNumber'] = self._server_session.transaction_id
             return
 
-        if self.in_transaction:
+        if self._in_transaction:
             if read_preference != ReadPreference.PRIMARY:
                 raise InvalidOperation(
                     'read preference in a transaction must be primary, not: '
@@ -835,13 +832,12 @@ class ClientSession(object):
 
 
 class _ServerSession(object):
-    def __init__(self, pool_id):
+    def __init__(self):
         # Ensure id is type 4, regardless of CodecOptions.uuid_representation.
         self.session_id = {'id': Binary(uuid.uuid4().bytes, 4)}
         self.last_use = monotonic.time()
         self._transaction_id = 0
         self.dirty = False
-        self.pool_id = pool_id
 
     def mark_dirty(self):
         """Mark this session as dirty.
@@ -871,14 +867,6 @@ class _ServerSessionPool(collections.deque):
 
     This class is not thread-safe, access it while holding the Topology lock.
     """
-    def __init__(self, *args, **kwargs):
-        super(_ServerSessionPool, self).__init__(*args, **kwargs)
-        self.pool_id = 0
-
-    def reset(self):
-        self.pool_id += 1
-        self.clear()
-
     def pop_all(self):
         ids = []
         while self:
@@ -899,7 +887,7 @@ class _ServerSessionPool(collections.deque):
             if not s.timed_out(session_timeout_minutes):
                 return s
 
-        return _ServerSession(self.pool_id)
+        return _ServerSession()
 
     def return_server_session(self, server_session, session_timeout_minutes):
         self._clear_stale(session_timeout_minutes)
@@ -907,9 +895,7 @@ class _ServerSessionPool(collections.deque):
             self.return_server_session_no_lock(server_session)
 
     def return_server_session_no_lock(self, server_session):
-        # Discard sessions from an old pool to avoid duplicate sessions in the
-        # child process after a fork.
-        if server_session.pool_id == self.pool_id and not server_session.dirty:
+        if not server_session.dirty:
             self.appendleft(server_session)
 
     def _clear_stale(self, session_timeout_minutes):

DAPlatform/venv/Lib/site-packages/pymongo/common.py

@@ -824,7 +824,7 @@ class BaseObject(object):
         """Read only access to the write concern of this instance or session.
         """
         # Override this operation's write concern with the transaction's.
-        if session and session.in_transaction:
+        if session and session._in_transaction:
             return DEFAULT_WRITE_CONCERN
         return self.write_concern
 

DAPlatform/venv/Lib/site-packages/pymongo/daemon.py

-# Copyright 2019-present MongoDB, Inc.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-"""Support for spawning a daemon process.
-
-PyMongo only attempts to spawn the mongocryptd daemon process when automatic
-client-side field level encryption is enabled. See
-:ref:`automatic-client-side-encryption` for more info.
-"""
-
-import os
-import subprocess
-import sys
-import time
-
-# The maximum amount of time to wait for the intermediate subprocess.
-_WAIT_TIMEOUT = 10
-_THIS_FILE = os.path.realpath(__file__)
-
-if sys.version_info[0] < 3:
-    def _popen_wait(popen, timeout):
-        """Implement wait timeout support for Python 2."""
-        from pymongo.monotonic import time as _time
-        deadline = _time() + timeout
-        # Initial delay of 1ms
-        delay = .0005
-        while True:
-            returncode = popen.poll()
-            if returncode is not None:
-                return returncode
-
-            remaining = deadline - _time()
-            if remaining <= 0:
-                # Just return None instead of raising an error.
-                return None
-            delay = min(delay * 2, remaining, .5)
-            time.sleep(delay)
-
-else:
-    def _popen_wait(popen, timeout):
-        """Implement wait timeout support for Python 3."""
-        try:
-            return popen.wait(timeout=timeout)
-        except subprocess.TimeoutExpired:
-            # Silence TimeoutExpired errors.
-            return None
-
-
-def _silence_resource_warning(popen):
-    """Silence Popen's ResourceWarning.
-
-    Note this should only be used if the process was created as a daemon.
-    """
-    # Set the returncode to avoid this warning when popen is garbage collected:
-    # "ResourceWarning: subprocess XXX is still running".
-    # See https://bugs.python.org/issue38890 and
-    # https://bugs.python.org/issue26741.
-    popen.returncode = 0
-
-
-if sys.platform == 'win32':
-    # On Windows we spawn the daemon process simply by using DETACHED_PROCESS.
-    _DETACHED_PROCESS = getattr(subprocess, 'DETACHED_PROCESS', 0x00000008)
-
-    def _spawn_daemon(args):
-        """Spawn a daemon process (Windows)."""
-        with open(os.devnull, 'r+b') as devnull:
-            popen = subprocess.Popen(
-                args,
-                creationflags=_DETACHED_PROCESS,
-                stdin=devnull, stderr=devnull, stdout=devnull)
-            _silence_resource_warning(popen)
-else:
-    # On Unix we spawn the daemon process with a double Popen.
-    # 1) The first Popen runs this file as a Python script using the current
-    #    interpreter.
-    # 2) The script then decouples itself and performs the second Popen to
-    #    spawn the daemon process.
-    # 3) The original process waits up to 10 seconds for the script to exit.
-    #
-    # Note that we do not call fork() directly because we want this procedure
-    # to be safe to call from any thread. Using Popen instead of fork also
-    # avoids triggering the application's os.register_at_fork() callbacks when
-    # we spawn the mongocryptd daemon process.
-    def _spawn(args):
-        """Spawn the process and silence stdout/stderr."""
-        with open(os.devnull, 'r+b') as devnull:
-            return subprocess.Popen(
-                args,
-                close_fds=True,
-                stdin=devnull, stderr=devnull, stdout=devnull)
-
-
-    def _spawn_daemon_double_popen(args):
-        """Spawn a daemon process using a double subprocess.Popen."""
-        spawner_args = [sys.executable, _THIS_FILE]
-        spawner_args.extend(args)
-        temp_proc = subprocess.Popen(spawner_args, close_fds=True)
-        # Reap the intermediate child process to avoid creating zombie
-        # processes.
-        _popen_wait(temp_proc, _WAIT_TIMEOUT)
-
-
-    def _spawn_daemon(args):
-        """Spawn a daemon process (Unix)."""
-        # "If Python is unable to retrieve the real path to its executable,
-        # sys.executable will be an empty string or None".
-        if sys.executable:
-            _spawn_daemon_double_popen(args)
-        else:
-            # Fallback to spawn a non-daemon process without silencing the
-            # resource warning. We do not use fork here because it is not
-            # safe to call from a thread on all systems.
-            # Unfortunately, this means that:
-            # 1) If the parent application is killed via Ctrl-C, the
-            #    non-daemon process will also be killed.
-            # 2) Each non-daemon process will hang around as a zombie process
-            #    until the main application exits.
-            _spawn(args)
-
-
-    if __name__ == '__main__':
-        # Attempt to start a new session to decouple from the parent.
-        if hasattr(os, 'setsid'):
-            try:
-                os.setsid()
-            except OSError:
-                pass
-
-        # We are performing a double fork (Popen) to spawn the process as a
-        # daemon so it is safe to ignore the resource warning.
-        _silence_resource_warning(_spawn(sys.argv[1:]))
-        os._exit(0)

DAPlatform/venv/Lib/site-packages/pymongo/database.py

@@ -823,7 +823,7 @@ class Database(common.BaseObject):
 
         For example, to list all non-system collections::
 
-            filter = {"name": {"$regex": r"^(?!system\\.)"}}
+            filter = {"name": {"$regex": r"^(?!system\.)"}}
             db.list_collection_names(filter=filter)
 
         :Parameters:

DAPlatform/venv/Lib/site-packages/pymongo/encryption.py

@@ -12,10 +12,13 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-"""Support for explicit client-side field level encryption."""
+"""Support for explicit client side encryption.
+
+**Support for client side encryption is in beta. Backwards-breaking changes
+may be made before the final release.**
+"""
 
 import contextlib
-import os
 import subprocess
 import uuid
 import weakref
@@ -31,7 +34,7 @@ except ImportError:
     _HAVE_PYMONGOCRYPT = False
     MongoCryptCallback = object
 
-from bson import _dict_to_bson, decode, encode
+from bson import _bson_to_dict, _dict_to_bson, decode, encode
 from bson.codec_options import CodecOptions
 from bson.binary import (Binary,
                          STANDARD,
@@ -46,13 +49,14 @@ from pymongo.errors import (ConfigurationError,
                             EncryptionError,
                             InvalidOperation,
                             ServerSelectionTimeoutError)
+from pymongo.message import (_COMMAND_OVERHEAD,
+                             _MAX_ENC_BSON_SIZE,
+                             _raise_document_too_large)
 from pymongo.mongo_client import MongoClient
 from pymongo.pool import _configured_socket, PoolOptions
 from pymongo.read_concern import ReadConcern
 from pymongo.ssl_support import get_ssl_context
-from pymongo.uri_parser import parse_host
 from pymongo.write_concern import WriteConcern
-from pymongo.daemon import _spawn_daemon
 
 
 _HTTPS_PORT = 443
@@ -106,12 +110,11 @@ class _EncryptionIO(MongoCryptCallback):
         """
         endpoint = kms_context.endpoint
         message = kms_context.message
-        host, port = parse_host(endpoint, _HTTPS_PORT)
         ctx = get_ssl_context(None, None, None, None, None, None, True)
         opts = PoolOptions(connect_timeout=_KMS_CONNECT_TIMEOUT,
                            socket_timeout=_KMS_CONNECT_TIMEOUT,
                            ssl_context=ctx)
-        conn = _configured_socket((host, port), opts)
+        conn = _configured_socket((endpoint, _HTTPS_PORT), opts)
         try:
             conn.sendall(message)
             while kms_context.bytes_needed > 0:
@@ -147,7 +150,7 @@ class _EncryptionIO(MongoCryptCallback):
         self._spawned = True
         args = [self.opts._mongocryptd_spawn_path or 'mongocryptd']
         args.extend(self.opts._mongocryptd_spawn_args)
-        _spawn_daemon(args)
+        subprocess.Popen(args)
 
     def mark_command(self, database, cmd):
         """Mark a command for encryption.
@@ -199,13 +202,13 @@ class _EncryptionIO(MongoCryptCallback):
         :Returns:
           The _id of the inserted data key document.
         """
-        raw_doc = RawBSONDocument(data_key)
-        data_key_id = raw_doc.get('_id')
-        if not isinstance(data_key_id, uuid.UUID):
-            raise TypeError('data_key _id must be a UUID')
-
-        self.key_vault_coll.insert_one(raw_doc)
-        return Binary(data_key_id.bytes, subtype=UUID_SUBTYPE)
+        # insert does not return the inserted _id when given a RawBSONDocument.
+        doc = _bson_to_dict(data_key, _DATA_KEY_OPTS)
+        if not isinstance(doc.get('_id'), uuid.UUID):
+            raise TypeError(
+                'data_key _id must be a bson.binary.Binary with subtype 4')
+        res = self.key_vault_coll.insert_one(doc)
+        return Binary(res.inserted_id.bytes, subtype=UUID_SUBTYPE)
 
     def bson_encode(self, doc):
         """Encode a document to BSON.
@@ -269,6 +272,10 @@ class _Encrypter(object):
         # check_keys.
         cluster_time = check_keys and cmd.pop('$clusterTime', None)
         encoded_cmd = _dict_to_bson(cmd, check_keys, codec_options)
+        max_cmd_size = _MAX_ENC_BSON_SIZE + _COMMAND_OVERHEAD
+        if len(encoded_cmd) > max_cmd_size:
+            raise _raise_document_too_large(
+                next(iter(cmd)), len(encoded_cmd), max_cmd_size)
         with _wrap_encryption_errors():
             encrypted_cmd = self._auto_encrypter.encrypt(database, encoded_cmd)
             # TODO: PYTHON-1922 avoid decoding the encrypted_cmd.
@@ -333,11 +340,11 @@ class Algorithm(object):
 
 
 class ClientEncryption(object):
-    """Explicit client-side field level encryption."""
+    """Explicit client side encryption."""
 
     def __init__(self, kms_providers, key_vault_namespace, key_vault_client,
                  codec_options):
-        """Explicit client-side field level encryption.
+        """Explicit client side encryption.
 
         The ClientEncryption class encapsulates explicit operations on a key
         vault collection that cannot be done directly on a MongoClient. Similar
@@ -348,7 +355,8 @@ class ClientEncryption(object):
         creating data keys. It does not provide an API to query keys from the
         key vault collection, as this can be done directly on the MongoClient.
 
-        See :ref:`explicit-client-side-encryption` for an example.
+        .. note:: Support for client side encryption is in beta.
+           Backwards-breaking changes may be made before the final release.
 
         :Parameters:
           - `kms_providers`: Map of KMS provider options. Two KMS providers
@@ -371,18 +379,15 @@ class ClientEncryption(object):
             containing the `key_vault_namespace` collection.
           - `codec_options`: An instance of
             :class:`~bson.codec_options.CodecOptions` to use when encoding a
-            value for encryption and decoding the decrypted BSON value. This
-            should be the same CodecOptions instance configured on the
-            MongoClient, Database, or Collection used to access application
-            data.
+            value for encryption and decoding the decrypted BSON value.
 
         .. versionadded:: 3.9
         """
         if not _HAVE_PYMONGOCRYPT:
             raise ConfigurationError(
-                "client-side field level encryption requires the pymongocrypt "
-                "library: install a compatible version with: "
-                "python -m pip install 'pymongo[encryption]'")
+                "client side encryption requires the pymongocrypt library: "
+                "install a compatible version with: "
+                "python -m pip install pymongo['encryption']")
 
         if not isinstance(codec_options, CodecOptions):
             raise TypeError("codec_options must be an instance of "
@@ -407,17 +412,15 @@ class ClientEncryption(object):
         :Parameters:
           - `kms_provider`: The KMS provider to use. Supported values are
             "aws" and "local".
-          - `master_key`: Identifies a KMS-specific key used to encrypt the
-            new data key. If the kmsProvider is "local" the `master_key` is
-            not applicable and may be omitted. If the `kms_provider` is "aws"
-            it is required and has the following fields::
-
-              - `region` (string): Required. The AWS region, e.g. "us-east-1".
-              - `key` (string): Required. The Amazon Resource Name (ARN) to
-                 the AWS customer.
-              - `endpoint` (string): Optional. An alternate host to send KMS
-                requests to. May include port number, e.g.
-                "kms.us-east-1.amazonaws.com:443".
+          - `master_key`: The `master_key` identifies a KMS-specific key used
+            to encrypt the new data key. If the kmsProvider is "local" the
+            `master_key` is not applicable and may be omitted.
+            If the `kms_provider` is "aws", `master_key` is required and must
+            have the following fields:
+
+              - `region` (string): The AWS region as a string.
+              - `key` (string): The Amazon Resource Name (ARN) to the AWS
+                customer master key (CMK).
 
           - `key_alt_names` (optional): An optional list of string alternate
             names used to reference a key. If a key is created with alternate
@@ -431,9 +434,7 @@ class ClientEncryption(object):
                                         algorithm=Algorithm.Random)
 
         :Returns:
-          The ``_id`` of the created data key document as a
-          :class:`~bson.binary.Binary` with subtype
-          :data:`~bson.binary.UUID_SUBTYPE`.
+          The ``_id`` of the created data key document.
         """
         self._check_closed()
         with _wrap_encryption_errors():

DAPlatform/venv/Lib/site-packages/pymongo/encryption_options.py

@@ -12,7 +12,11 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-"""Support for automatic client-side field level encryption."""
+"""Support for automatic client side encryption.
+
+**Support for client side encryption is in beta. Backwards-breaking changes
+may be made before the final release.**
+"""
 
 import copy
 
@@ -26,7 +30,7 @@ from pymongo.errors import ConfigurationError
 
 
 class AutoEncryptionOpts(object):
-    """Options to configure automatic client-side field level encryption."""
+    """Options to configure automatic encryption."""
 
     def __init__(self, kms_providers, key_vault_namespace,
                  key_vault_client=None, schema_map=None,
@@ -35,21 +39,21 @@ class AutoEncryptionOpts(object):
                  mongocryptd_bypass_spawn=False,
                  mongocryptd_spawn_path='mongocryptd',
                  mongocryptd_spawn_args=None):
-        """Options to configure automatic client-side field level encryption.
+        """Options to configure automatic encryption.
 
-        Automatic client-side field level encryption requires MongoDB 4.2
-        enterprise or a MongoDB 4.2 Atlas cluster. Automatic encryption is not
+        Automatic encryption is an enterprise only feature that only
+        applies to operations on a collection. Automatic encryption is not
         supported for operations on a database or view and will result in
-        error.
+        error. To bypass automatic encryption (but enable automatic
+        decryption), set ``bypass_auto_encryption=True`` in
+        AutoEncryptionOpts.
 
-        Although automatic encryption requires MongoDB 4.2 enterprise or a
-        MongoDB 4.2 Atlas cluster, automatic *decryption* is supported for all
-        users. To configure automatic *decryption* without automatic
-        *encryption* set ``bypass_auto_encryption=True``. Explicit
-        encryption and explicit decryption is also supported for all users
-        with the :class:`~pymongo.encryption.ClientEncryption` class.
+        Explicit encryption/decryption and automatic decryption is a
+        community feature. A MongoClient configured with
+        bypassAutoEncryption=true will still automatically decrypt.
 
-        See :ref:`automatic-client-side-encryption` for an example.
+        .. note:: Support for client side encryption is in beta.
+           Backwards-breaking changes may be made before the final release.
 
         :Parameters:
           - `kms_providers`: Map of KMS provider options. Two KMS providers
@@ -111,7 +115,7 @@ class AutoEncryptionOpts(object):
             raise ConfigurationError(
                 "client side encryption requires the pymongocrypt library: "
                 "install a compatible version with: "
-                "python -m pip install 'pymongo[encryption]'")
+                "python -m pip install pymongo['encryption']")
 
         self._kms_providers = kms_providers
         self._key_vault_namespace = key_vault_namespace

DAPlatform/venv/Lib/site-packages/pymongo/errors.py

@@ -46,16 +46,10 @@ class PyMongoError(Exception):
         """Remove the given label from this error."""
         self._error_labels.remove(label)
 
-    if sys.version_info[0] == 2:
-        def __str__(self):
-            if isinstance(self._message, unicode):
-                return self._message.encode('utf-8', errors='replace')
-            return str(self._message)
-
-        def __unicode__(self):
-            if isinstance(self._message, unicode):
-                return self._message
-            return unicode(self._message, 'utf-8', errors='replace')
+    def __str__(self):
+        if sys.version_info[0] == 2 and isinstance(self._message, unicode):
+            return self._message.encode('utf-8', errors='replace')
+        return str(self._message)
 
 
 class ProtocolError(PyMongoError):

DAPlatform/venv/Lib/site-packages/pymongo/message.py

@@ -26,8 +26,6 @@ import struct
 
 import bson
 from bson import (CodecOptions,
-                  decode,
-                  encode,
                   _dict_to_bson,
                   _make_c_string)
 from bson.codec_options import DEFAULT_CODEC_OPTIONS
@@ -205,7 +203,7 @@ def _gen_find_command(coll, spec, projection, skip, limit, batch_size, options,
             cmd['singleBatch'] = True
     if batch_size:
         cmd['batchSize'] = batch_size
-    if read_concern.level and not (session and session.in_transaction):
+    if read_concern.level and not (session and session._in_transaction):
         cmd['readConcern'] = read_concern.document
     if collation:
         cmd['collation'] = collation
@@ -304,7 +302,7 @@ class _Query(object):
             # Explain does not support readConcern.
             if (not explain and session.options.causal_consistency
                     and session.operation_time is not None
-                    and not session.in_transaction):
+                    and not session._in_transaction):
                 cmd.setdefault(
                     'readConcern', {})[
                     'afterClusterTime'] = session.operation_time
@@ -422,7 +420,7 @@ class _GetMore(object):
             spec = self.as_command(sock_info)[0]
             if sock_info.op_msg_enabled:
                 request_id, msg, size, _ = _op_msg(
-                    0, spec, self.db, None,
+                    0, spec, self.db, ReadPreference.PRIMARY,
                     False, False, self.codec_options,
                     ctx=sock_info.compression_context)
                 return request_id, msg, size
@@ -685,8 +683,7 @@ def _op_msg(flags, command, dbname, read_preference, slave_ok, check_keys,
             opts, ctx=None):
     """Get a OP_MSG message."""
     command['$db'] = dbname
-    # getMore commands do not send $readPreference.
-    if read_preference is not None and "$readPreference" not in command:
+    if "$readPreference" not in command:
         if slave_ok and not read_preference.mode:
             command["$readPreference"] = (
                 ReadPreference.PRIMARY_PREFERRED.document)
@@ -923,9 +920,6 @@ class _BulkWriteContext(object):
     @property
     def max_message_size(self):
         """A proxy for SockInfo.max_message_size."""
-        if self.compress:
-            # Subtract 16 bytes for the message header.
-            return self.sock_info.max_message_size - 16
         return self.sock_info.max_message_size
 
     @property
@@ -933,11 +927,6 @@ class _BulkWriteContext(object):
         """A proxy for SockInfo.max_write_batch_size."""
         return self.sock_info.max_write_batch_size
 
-    @property
-    def max_split_size(self):
-        """The maximum size of a BSON command before batch splitting."""
-        return self.max_bson_size
-
     def legacy_bulk_insert(
             self, request_id, msg, max_doc_size, acknowledged, docs, compress):
         if compress:
@@ -1020,11 +1009,10 @@ class _BulkWriteContext(object):
             request_id, self.sock_info.address, self.op_id)
 
 
-# From the Client Side Encryption spec:
-# Because automatic encryption increases the size of commands, the driver
-# MUST split bulk writes at a reduced size limit before undergoing automatic
-# encryption. The write payload MUST be split at 2MiB (2097152).
-_MAX_SPLIT_SIZE_ENC = 2097152
+# 2MiB
+_MAX_ENC_BSON_SIZE = 2 * (1024 * 1024)
+# 6MB
+_MAX_ENC_MESSAGE_SIZE = 6 * (1000 * 1000)
 
 
 class _EncryptedBulkWriteContext(_BulkWriteContext):
@@ -1059,9 +1047,14 @@ class _EncryptedBulkWriteContext(_BulkWriteContext):
         return to_send
 
     @property
-    def max_split_size(self):
-        """Reduce the batch splitting size."""
-        return _MAX_SPLIT_SIZE_ENC
+    def max_bson_size(self):
+        """A proxy for SockInfo.max_bson_size."""
+        return min(self.sock_info.max_bson_size, _MAX_ENC_BSON_SIZE)
+
+    @property
+    def max_message_size(self):
+        """A proxy for SockInfo.max_message_size."""
+        return min(self.sock_info.max_message_size, _MAX_ENC_MESSAGE_SIZE)
 
 
 def _raise_document_too_large(operation, doc_size, max_size):
@@ -1393,7 +1386,6 @@ def _batched_write_command_impl(
     # Max BSON object size + 16k - 2 bytes for ending NUL bytes.
     # Server guarantees there is enough room: SERVER-10643.
     max_cmd_size = max_bson_size + _COMMAND_OVERHEAD
-    max_split_size = ctx.max_split_size
 
     # No options
     buf.write(_ZERO_32)
@@ -1405,7 +1397,7 @@ def _batched_write_command_impl(
 
     # Where to write command document length
     command_start = buf.tell()
-    buf.write(encode(command))
+    buf.write(bson.BSON.encode(command))
 
     # Start of payload
     buf.seek(-1, 2)
@@ -1426,17 +1418,16 @@ def _batched_write_command_impl(
     for doc in docs:
         # Encode the current operation
         key = b(str(idx))
-        value = encode(doc, check_keys, opts)
+        value = bson.BSON.encode(doc, check_keys, opts)
         # Is there enough room to add this document? max_cmd_size accounts for
         # the two trailing null bytes.
         doc_too_large = len(value) > max_cmd_size
+        enough_data = (buf.tell() + len(key) + len(value)) >= max_cmd_size
+        enough_documents = (idx >= max_write_batch_size)
         if doc_too_large:
             write_op = list(_FIELD_MAP.keys())[operation]
             _raise_document_too_large(
                 write_op, len(value), max_bson_size)
-        enough_data = (idx >= 1 and
-                       (buf.tell() + len(key) + len(value)) >= max_split_size)
-        enough_documents = (idx >= max_write_batch_size)
         if enough_data or enough_documents:
             break
         buf.write(_BSONOBJ)

DAPlatform/venv/Lib/site-packages/pymongo/mongo_client.py

@@ -481,8 +481,9 @@ class MongoClient(common.BaseObject):
           - `auto_encryption_opts`: A
             :class:`~pymongo.encryption_options.AutoEncryptionOpts` which
             configures this client to automatically encrypt collection commands
-            and automatically decrypt results. See
-            :ref:`automatic-client-side-encryption` for an example.
+            and automatically decrypt results. **Support for client side
+            encryption is in beta. Backwards-breaking changes may be made
+            before the final release.**
 
         .. mongodoc:: connections
 
@@ -1165,10 +1166,10 @@ class MongoClient(common.BaseObject):
         session_ids = self._topology.pop_all_sessions()
         if session_ids:
             self._end_sessions(session_ids)
-        # Stop the periodic task thread and then send pending killCursor
-        # requests before closing the topology.
+        # Stop the periodic task thread and then run _process_periodic_tasks
+        # to send pending killCursor requests before closing the topology.
         self._kill_cursors_executor.close()
-        self._process_kill_cursors()
+        self._process_periodic_tasks()
         self._topology.close()
         if self._encrypter:
             # TODO: PYTHON-1921 Encrypted MongoClients cannot be re-opened.
@@ -1254,7 +1255,7 @@ class MongoClient(common.BaseObject):
                 # Pin this session to the selected server if it's performing a
                 # sharded transaction.
                 if server.description.mongos and (session and
-                                                  session.in_transaction):
+                                                  session._in_transaction):
                     session._pin_mongos(server)
             return server
         except PyMongoError as exc:
@@ -1354,7 +1355,7 @@ class MongoClient(common.BaseObject):
         Re-raises any exception thrown by func().
         """
         retryable = (retryable and self.retry_writes
-                     and session and not session.in_transaction)
+                     and session and not session._in_transaction)
         last_error = None
         retrying = False
 
@@ -1444,7 +1445,7 @@ class MongoClient(common.BaseObject):
         """
         retryable = (retryable and
                      self.retry_reads
-                     and not (session and session.in_transaction))
+                     and not (session and session._in_transaction))
         last_error = None
         retrying = False
 
@@ -1717,8 +1718,10 @@ class MongoClient(common.BaseObject):
                         duration, reply, 'killCursors', request_id,
                         tuple(address))
 
-    def _process_kill_cursors(self):
-        """Process any pending kill cursors requests."""
+    # This method is run periodically by a background thread.
+    def _process_periodic_tasks(self):
+        """Process any pending kill cursors requests and
+        maintain connection pool parameters."""
         address_to_cursor_ids = defaultdict(list)
 
         # Other threads or the GC may append to the queue concurrently.
@@ -1739,12 +1742,6 @@ class MongoClient(common.BaseObject):
                         cursor_ids, address, topology, session=None)
                 except Exception:
                     helpers._handle_exception()
-
-    # This method is run periodically by a background thread.
-    def _process_periodic_tasks(self):
-        """Process any pending kill cursors requests and
-        maintain connection pool parameters."""
-        self._process_kill_cursors()
         try:
             self._topology.update_pool()
         except Exception:

DAPlatform/venv/Lib/site-packages/pymongo/network.py

@@ -98,7 +98,7 @@ def command(sock, dbname, spec, slave_ok, is_mongos,
     orig = spec
     if is_mongos and not use_op_msg:
         spec = message._maybe_add_read_preference(spec, read_preference)
-    if read_concern and not (session and session.in_transaction):
+    if read_concern and not (session and session._in_transaction):
         if read_concern.level:
             spec['readConcern'] = read_concern.document
         if (session and session.options.causal_consistency

DAPlatform/venv/Lib/site-packages/pymongo/pool.py

@@ -1033,19 +1033,14 @@ class Pool:
     def close(self):
         self._reset(close=True)
 
-    def remove_stale_sockets(self, reference_pool_id):
-        """Removes stale sockets then adds new ones if pool is too small and
-        has not been reset. The `reference_pool_id` argument specifies the
-        `pool_id` at the point in time this operation was requested on the
-        pool.
-        """
+    def remove_stale_sockets(self):
+        """Removes stale sockets then adds new ones if pool is too small."""
         if self.opts.max_idle_time_seconds is not None:
             with self.lock:
                 while (self.sockets and
                        self.sockets[-1].idle_time_seconds() > self.opts.max_idle_time_seconds):
                     sock_info = self.sockets.pop()
                     sock_info.close_socket(ConnectionClosedReason.IDLE)
-
         while True:
             with self.lock:
                 if (len(self.sockets) + self.active_sockets >=
@@ -1059,11 +1054,6 @@ class Pool:
             try:
                 sock_info = self.connect()
                 with self.lock:
-                    # Close connection and return if the pool was reset during
-                    # socket creation or while acquiring the pool lock.
-                    if self.pool_id != reference_pool_id:
-                        sock_info.close_socket(ConnectionClosedReason.STALE)
-                        break
                     self.sockets.appendleft(sock_info)
             finally:
                 self._socket_semaphore.release()

DAPlatform/venv/Lib/site-packages/pymongo/topology.py

@@ -156,10 +156,6 @@ class Topology(object):
                     "after forking. See PyMongo's documentation for details: "
                     "http://api.mongodb.org/python/current/faq.html#"
                     "is-pymongo-fork-safe")
-                with self._lock:
-                    # Reset the session pool to avoid duplicate sessions in
-                    # the child process.
-                    self._session_pool.reset()
 
         with self._lock:
             self._ensure_opened()
@@ -429,13 +425,9 @@ class Topology(object):
 
     def update_pool(self):
         # Remove any stale sockets and add new sockets if pool is too small.
-        servers = []
         with self._lock:
             for server in self._servers.values():
-                servers.append((server, server._pool.pool_id))
-
-        for server, pool_id in servers:
-            server._pool.remove_stale_sockets(pool_id)
+                server._pool.remove_stale_sockets()
 
     def close(self):
         """Clear pools and terminate monitors. Topology reopens on demand."""