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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 clear_session_cookies(self):
 """Discard all session cookies. Note that the .save() method won't save session cookies anyway, unless you ask otherwise by passing a true ignore_discard argument. """

        self._cookies_lock.acquire()
        try:
            for cookie in self:
                if cookie.discard:
                    self.clear(cookie.domain, cookie.path, cookie.name)
        finally:
            self._cookies_lock.release()