How do I check the versions of Python modules?

I installed the Python modules construct and statlib using setuptools:

sudo apt-get install python-setuptools

sudo easy_install statlib
sudo easy_install construct

How do I check their versions from the command line?

Use pip instead of easy_install.

With pip, list all installed packages and their versions via:
pip freeze


On most Linux systems, you can pipe this to grep (or findstr on Windows) to find the row for the particular package you're interested in.

Linux:
pip freeze | grep lxml


lxml==2.3

Windows:
pip freeze | findstr lxml


lxml==2.3

For an individual module, you can try the __version__ attribute. However, there are modules without it:
python -c "import requests; print(requests.__version__)"
2.14.2

python -c "import lxml; print(lxml.__version__)"


Traceback (most recent call last):

File "", line 1, in

AttributeError: 'module' object has no attribute '__version__'

Lastly, as the commands in your question are prefixed with sudo, it appears you're installing to the global python environment. I strongly advise to take look into Python virtual environment managers, for example virtualenvwrapper.

Stack Overflow Q#20180543, score: 1178