docs: def find_dunder_version_in_file(self, full_path):  # type: (str)-> Dict[str,str]
          """
          Find __version__ in a source file
          :param full_path:
          :return:
          """
          versions = {}
  
          with self.file_opener.open_this(full_path, "r") as infile:
              for line in infile:
                  version, _ = dunder_version.find_in_line(line)
                  if version:
                      versions[full_path] = version
                  version, _ = dunder_version.find_in_line(line)
          return versions