What is the meaning of “Failed building wheel for X” in pip install?

Question

This is a truly popular question here at SO, but none of the many answers I have looked at, clearly explain what this error really mean, and why it occurs.

One sour

Answer 1

Error :

System : aws ec2 instance (t2 small)

issue : while installing opencv python via

pip3 install opencv-python

  Problem with the CMake installation, aborting build. CMake executable is cmake
  
  ----------------------------------------
  Failed building wheel for opencv-python
  Running setup.py clean for opencv-python

What worked for me

pip3 install --upgrade pip setuptools wheel

After this you still might received fallowing error error

    from .cv2 import *
ImportError: libGL.so.1: cannot open shared object file: No such file or directory

Installing libgl solved the error for me.

sudo apt update
sudo apt install libgl1-mesa-glx

Hope this helps