安装ANTLR3 Python Runtime后仍无法导入fstpso包的问题求助

Let’s work through the issues you’re facing step by step—here are the most likely fixes to get fstpso recognizing your ANTLR3 runtime:

1. Verify the ANTLR3 Runtime is Actually Installed and Accessible #

First, confirm your Python 2.7 instance can see the ANTLR3 runtime at all:

• Run this terminal command to test direct import:

  python -c "import antlr3; print(antlr3.__file__)"
  

  If this throws an import error, the runtime wasn’t properly installed or isn’t in Python’s search path.
• Check your Python site-packages directory (find its path with python -c "import site; print(site.getsitepackages())"). Look for either an antlr3 folder or the antlr_python_runtime-3.1.3-py2.7.egg file. If only the egg exists, try reinstalling with easy_install (it handles egg activation more reliably for some legacy setups):

  sudo easy_install antlr_python_runtime==3.1.3
  

2. Check Python’s Module Search Path #

The error often pops up when the directory with the ANTLR3 egg isn’t in Python’s sys.path:

• Print your current search path with:

  python -c "import sys; print('\n'.join(sys.path))"
  

• If /path/to/python/packages/ (where your egg was installed) isn’t listed, add it temporarily to test:

  export PYTHONPATH="/path/to/python/packages/:$PYTHONPATH"
  

  Now try importing fstpso again. If this works, make the change permanent by adding the above line to your ~/.bashrc or ~/.profile file (run source ~/.bashrc to apply it immediately).

3. Rule Out Virtual Environment Conflicts #

If you’re using a virtual environment (like virtualenv), you might have installed the ANTLR3 runtime to the global Python 2.7 instead of your active virtual environment:

• Check which Python interpreter you’re using:

  which python
  

  If this path points to a virtual environment, reinstall the ANTLR3 runtime without sudo (virtual environments don’t require system-level permissions):

  pip install antlr_python_runtime==3.1.3
  

  (Note: You may need to install pip for your virtual environment first if it’s missing.)

4. Validate the fstpso Detection Logic #

If import antlr3 works but fstpso still throws an error, the issue might be in how fstpso/pyfuzzy checks for the runtime:

• Locate the pyfuzzy module’s code with python -c "import pyfuzzy; print(pyfuzzy.__file__)", then open it and look for lines that check for ANTLR3. Sometimes these checks hardcode version numbers or paths that don’t match your setup.
• If you find a version check, verify it’s compatible with 3.1.3 (the version you installed).

内容的提问来源于stack exchange，提问作者Curious Iitian