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Lines Matching refs:_environ

738         self._environ = os.environ
742 return self._environ[envvar]
747 self._changed[envvar] = self._environ.get(envvar)
748 self._environ[envvar] = value
753 self._changed[envvar] = self._environ.get(envvar)
754 if envvar in self._environ:
755 del self._environ[envvar]
758 return self._environ.keys()
772 if k in self._environ:
773 del self._environ[k]
775 self._environ[k] = v
776 os.environ = self._environ