human
Solve the following python programming problem given the following code:
def _subprocess_env(self, step_num, step_type, task_num, working_dir, **split_kwargs) : 
    "Set up environment variables for a subprocess (mapper, etc.)

        This combines, in decreasing order of priority:

        * environment variables set by the **cmdenv** option
        * **jobconf** environment variables set by our job (e.g.
          ``mapreduce.task.ismap`)
        * environment variables from **jobconf** options, translated to
          whatever version of Hadoop we're emulating
        * the current environment
        * PYTHONPATH set to current working directory

        We use :py:func:`~mrjob.conf.combine_local_envs`, so ``PATH``
        environment variables are handled specially.
        " 
    user_jobconf = self._jobconf_for_step (step_num) 
    simulated_jobconf = self._simulate_jobconf_for_step (step_num, step_type, task_num, step_num, ** split_kwargs) 
    def to_env(jobconf) : 
        return dict (((k.replace ('.', '_'), str (v)) for (k, v) in jobconf.items ())) 
return combine_local_envs (os.environ, to_env (user_jobconf), to_env (simulated_jobconf), self._opts ['cmdenv']) 

    
    

    Fix the buggy line: simulated_jobconf = self._simulate_jobconf_for_step (step_num, step_type, task_num, step_num, ** split_kwargs)
assistant
#Here is Python program to fix the buggy line: simulated_jobconf = self.

simulated_jobconf = self._simulate_jobconf_for_step (step_num, step_type, task_num, working_dir, ** split_kwargs)