ModuleNotFoundError: No Module Named _Ctypes in Python 3.7

Aug 14, 2020

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

Issue

The error message "Modulenotfounderror: No Module Named _Ctypes" is thrown when intalling packages in Python 3.7.

Cause

libffi-dev is needed to cleanly build Python 3.7.

Solution

Remove Python …

Speed up Python Using Native Code

Apr 28, 2020

Tips and Traps¶

It is never a good idea to do pre-mature optimization. Always profile (please refer to Profile Performance of Python Applications and Python Profiler for JupyterLab Notebooks) your code before you optimize it. If you do decide to optimize you Python code, there are multiple approaches. First, think about whether you can improve your algorithm. Please refer to Python Performance Tips