Windows 8.1下pip命令未识别及pip安装失败问题求助

Hey there, let's work through this pip issue step by step—since you've already added C:\Python364\Scripts and C:\Python364\ to your system PATH but still run into problems, let's dig into targeted fixes:

• Verify your PATH changes actually took effect
  Sometimes modifying the system PATH doesn't apply to already open command prompts. Close all existing cmd/PowerShell windows, open a fresh one, and run:

  echo %PATH%
  

  Check if C:\Python364\ and C:\Python364\Scripts are clearly listed. If not, double-check:

  • Did you add them to the System PATH (not just your user-specific PATH)?
  • Are there typos in the paths? Make sure no extra spaces or wrong version numbers are present in the folder name.

• Bypass PATH entirely by calling pip via Python
  If the PATH issue persists, skip it entirely by using Python's built-in module runner. Run this command in your cmd:

  python -m pip install py2exe
  

  This tells your Python 3.6.4 installation to locate and run its native pip module directly, avoiding PATH dependencies.

• Repair a corrupted pip installation
  If the above command fails, your pip setup might be damaged. Use Python's built-in tool to fix it:

  python -m ensurepip --upgrade
  

  This will check for a working pip install and upgrade it to the latest version compatible with Python 3.6.4.

• Check your Python installation integrity
  It's possible some core components are missing from your Python 3.6.4 setup. Re-run the Python installer:

  1. Select the Modify option.
  2. Ensure the pip component is checked under "Optional Features".
  3. Confirm Add Python to environment variables is enabled.
  4. Click Modify to complete the repair.

• Try running with administrator privileges
  Permission restrictions can block pip from installing packages. Right-click Command Prompt and select "Run as administrator", then reattempt your pip command.

• Eliminate conflicts with multiple Python versions
  If other Python installations exist on your system, the python command might point to the wrong one. Verify which version you're using:

  python --version
  

  If it's not 3.6.4, use the full path to your Python executable:

  C:\Python364\python.exe -m pip install py2exe
  

Hopefully one of these steps resolves your issue. If you hit specific error messages while trying these, feel free to share them and we can narrow things down further!

内容的提问来源于stack exchange，提问作者Zane