code: def get_pex_python_paths():
      
      ppp = Variables.from_rc().get('PEX_PYTHON_PATH')
      if ppp:
        return ppp.split(os.pathsep)
      else:
        return []
docs: Returns a list of paths to Python interpreters as defined in a pexrc file.
  
      These are provided by a PEX_PYTHON_PATH in either of '/etc/pexrc', '~/.pexrc'.
      PEX_PYTHON_PATH defines a colon-separated list of paths to interpreters
      that a pex can be built and run against.