Getting an error while trying to use the bugzilla python package

Question

I am relatively new to Python. I am encountering an error while trying to use the bugzilla python package. Here is the code I am trying to execute:

import bugzilla
bz = bugzilla.Bugzilla(url="https://bugzilla.kernel.org")

Here is the error message I get:

AttributeError: module 'bugzilla' has no attribute 'Bugzilla'

Here are the details of my environment:

PyCharm Community Edition IDE on Windows 10.
Python 3.6.3 version.

I seem to have set the Python interpreter path correctly in PyCharm as I don't have any problem in using other packages such as pandas.

I installed both the bugzilla as well as the python-bugzilla packages using pip. I get the same error in both cases. What is the difference in these two packages? Appreciate any help in this regard.