External Dependencies Are the Root of All Evil

Open source software is great except when it isn't.

Update all the dependencies for a new cool software and older software (using older versions of those co-dependencies) suddenly breaks.  

In Windows, we used to call it "DLL Hell" but it has its manifestations in Linux too.

Then it's a cycle of repair and debugging.

Debugging Python - Module Versions

You may get errors in Python programs when you update external module dependencies, as the newer versions may have added some breaking changes - e.g. stronger validation or security checks. 

You can validate the version of the module you are using if __version__ is exposed by the module. To do this, try the following, using the module name required (urllib3 used here as an example):

python

import urllib3

print( urllib3.__version___)