DOCSP-46812 - Type Hints and Client Params (#156)

Author: mongoKart

source/connect/mongoclient.txt

@@ -97,6 +97,77 @@ instance on port ``27017`` of ``localhost``:
    uri = "mongodb://localhost:27017/"
    client = MongoClient(uri)
 
+The following table describes the positional parameters that the ``MongoClient()``
+constructor accepts. All parameters are optional.
+
+.. list-table::
+   :widths: 20 80
+   :header-rows: 1
+
+   * - Parameter
+     - Description
+
+   * - ``host``
+     - The hostname, IP address, or Unix domain socket path of the MongoDB deployment.
+       If your application connects to a replica set or sharded cluster, you can specify
+       multiple hostnames or IP addresses in a Python list.
+       
+       If you pass a literal IPv6 address, you must enclose the address in square brackets
+       (``[ ]``). For example, pass the value ``[::1]`` to connect to localhost.
+
+       {+driver-short+} doesn't support :wikipedia:`multihomed <Multihoming>` and
+       :wikipedia:`round-robin DNS <Round-robin_DNS>` addresses.
+
+       **Data type:** ``Union[str, Sequence[str]]``
+       **Default value:** ``"localhost"``
+
+   * - ``port``
+     - The port number {+mdb-server+} is running on.
+
+       You can include the port number in the ``host`` argument
+       instead of using this parameter.
+
+       **Data type:** ``int``
+       **Default value:** ``27017``
+
+   * - ``document_class``
+     - The default class that the client uses to decode BSON documents returned by queries.
+       This parameter supports the ``bson.raw_bson.RawBSONDocument`` type, as well as
+       subclasses of the ``collections.abc.Mapping`` type, such as ``bson.son.SON``.
+       
+       If you specify ``bson.son.SON`` as the document class, you must also specify types
+       for the key and value.
+
+       **Data type:** ``Type[_DocumentType]``
+
+   * - ``tz_aware``
+     - If this parameter is ``True``, the client treats ``datetime`` values as aware.
+       Otherwise, it treats them as naive.
+
+       For more information about aware and naive ``datetime`` values, see
+       `datetime <https://docs.python.org/3/library/datetime.html>`__ in the Python
+       documentation.
+
+       **Data type:** ``bool``
+
+   * - ``connect``
+     - If this parameter is ``True``, the client begins connecting to MongoDB
+       in the background immediately after you create it. If this parameter is ``False``,
+       the client connects to MongoDB when it performs the first database operation.
+       
+       If your application is running in a
+       :wikipedia:`function-as-a-service (FaaS) <Function_as_a_service>`
+       environment, the default value is ``False``. Otherwise, the default value is ``True``.
+
+       **Data type:** ``bool``
+
+   * - ``type_registry``
+     - An instance of the ``TypeRegistry`` class to enable encoding and decoding of
+       custom types. For more information about encoding and decoding custom types,
+       see :ref:`pymongo-custom-types`.
+
+       **Data type:** `TypeRegistry <{+api-root+}bson/codec_options.html#bson.codec_options.TypeRegistry>`__
+
 .. tip:: Reusing Your Client
 
    Because each ``MongoClient`` object represents a pool of connections to the
@@ -105,6 +176,28 @@ instance on port ``27017`` of ``localhost``:
    a process, the child process *does* need its own ``MongoClient`` object.
    To learn more, see the :ref:`FAQ <pymongo-faq>` page.
 
+Type Hints
+----------
+
+If you're using Python v3.5 or later, you can add type hints to your Python code.
+
+The following code example shows how to declare a type hint for a ``MongoClient``
+object:
+
+.. code-block:: python
+
+   client: MongoClient = MongoClient()
+
+In the previous example, the code doesn't specify a type for the documents that the
+``MongoClient`` object will work with. To specify a document type,
+include the ``Dict[str, Any]`` type when you
+create the ``MongoClient`` object, as shown in the following example:
+
+.. code-block:: python
+
+   from typing import Any, Dict
+   client: MongoClient[Dict[str, Any]] = MongoClient()
+
 API Documentation
 -----------------