Problems I've encountered and their solutions (Python)

General

• To "clean up" your system's default version of Python by removing all of the modules you've installed: (Source)
  
  1. pip freeze > requirements.txt
  2. pip uninstall -r requirements.txt -y

Python 2.7-specific

• pip install errors
  • Unable to find vcvarsall.bat
    
    • Background:
      • I was trying to get the Windows Cognitive Services example for their Face API working, which required Python 2.7 and the wx package. I couldn't get the wx package to install because it would give me that error message.
    • Solution: http://stackoverflow.com/a/5983696/4115031
      • I just downloaded the .whl file, moved it to the root directory of the project, ran 'pip install whl_file_name.whl', and it worked!