code: def infer_module_name(filename, fspath):
      
      filename, _ = os.path.splitext(filename)
      for f in fspath:
          short_name = f.relative_path(filename)
          if short_name:
              # The module name for __init__.py files is the directory.
              if short_name.endswith(os.path.sep + "__init__"):
                  short_name = short_name[:short_name.rfind(os.path.sep)]
              return short_name.replace(os.path.sep, '.')
      # We have not found filename relative to anywhere in pythonpath.
      return ''
docs: Convert a python filename to a module relative to pythonpath.