<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def run(self):
 """ Performs actual NWCHEM2FIESTA run """


        init_folder = os.getcwd()
        os.chdir(self.folder)

        with zopen(self.log_file, 'w') as fout:
            subprocess.call([self._NWCHEM2FIESTA_cmd, self._nwcheminput_fn,
                             self._nwchemoutput_fn, self._nwchemmovecs_fn],
                            stdout=fout)

        os.chdir(init_folder)