How to know which version of PyMongo is running on my project

This should work

python -c 'import pymongo; print (pymongo.__version__)'

If you got pip installed, you can try this in terminal:

$ pip freeze | grep pymongo
pymongo==3.0.2

You can learn like this,

>>> import pymongo
>>> pymongo.version
'3.0.3'

import pymongo
print("Mongo version",pymongo.__version__)

Works perfectly in python3