code: def load_source(self):
          
          if self.filename in self.STDIN_NAMES:
              self.filename = "stdin"
              if sys.version_info[0] < 3:
                  self.source = sys.stdin.read()
              else:
                  self.source = TextIOWrapper(sys.stdin.buffer, errors="ignore").read()
          else:
              # Could be a Python 2.7 StringIO with no context manager, sigh.
              # with tokenize_open(self.filename) as fd:
              #     self.source = fd.read()
              handle = tokenize_open(self.filename)
              self.source = handle.read()
              handle.close()
docs: Load the source for the specified file.