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Lines Matching refs:_environ

662         self._environ = os.environ

666 return self._environ[envvar]
671 self._changed[envvar] = self._environ.get(envvar)
672 self._environ[envvar] = value
677 self._changed[envvar] = self._environ.get(envvar)
678 if envvar in self._environ:
679 del self._environ[envvar]
682 return self._environ.keys()
696 if k in self._environ:
697 del self._environ[k]
699 self._environ[k] = v
700 os.environ = self._environ