Collection object is not callable error with PyMongo

Following along the PyMongo tutorial and am getting an error when calling the insert_one method on a collection.

    In [1]: import pymongo

    In [2]: from pymongo import MongoClient

    In [3]: client = MongoClient()

    In [4]: db = client.new_db

    In [5]: db
    Out[5]: Database(MongoClient('localhost', 27017), u'new_db')

    In [6]: posts = db.posts

    In [7]: posts.insert_one({'a':1})
    ---------------------------------------------------------------------------
    TypeError                                 Traceback (most recent call last)
    <ipython-input-7-2271c01f9a85> in <module>()
    ----> 1 posts.insert_one({'a':1})

    C:\Anaconda\lib\site-packages\pymongo-2.8-py2.7-win32.egg\pymongo\collection.py in __call__(self, *a
    rgs, **kwargs)
       1771                         "call the '%s' method on a 'Collection' object it is "
       1772                         "failing because no such method exists." %
    -> 1773                         self.__name.split(".")[-1])

    TypeError: 'Collection' object is not callable. If you meant to call the 'insert_one' method on a 'Collection' object it is failing because no such method exists.

There are a few posts online that discuss this error but all seem to be when the user calls a deprecated name.

Any guidance on what I am doing wrong here?

It is a clear question but the problem here seems to be that you are reading from the "beta" release documentation but in all likelihood you actually at most have "pymongo" 2.8 installed rather than the "3.0b" referred to in the link you quote.

The 2.8 release tutorial points to the .insert() method instead:

    posts.insert({'a':1})

Since .insert_one() is only available in the 3.0b driver.

Either force the installation of the "beta" driver or live with a stable driver and the available methods.

This seems to be the fault of the current "search engine response" matching the "beta release" as "current".

From: stackoverflow.com/q/28981718