code: def get_environ(self, parent_environ=None):
          
          interp = Python(target_environ={}, passive=True)
          executor = self._create_executor(interp, parent_environ)
          self._execute(executor)
          return executor.get_output()
docs: Get the environ dict resulting from interpreting this context.
  
          @param parent_environ Environment to interpret the context within,
              defaults to os.environ if None.
          @returns The environment dict generated by this context, when
              interpreted in a python rex interpreter.