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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _init_session(self, session):
 # type: (requests.Session) -> None """Init session level configuration of requests. This is initialization I want to do once only on a session. """

        _patch_redirect(session)

        # Change max_retries in current all installed adapters
        max_retries = self.config.retry_policy()
        for protocol in self._protocols:
            session.adapters[protocol].max_retries = max_retries