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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 connect(self):
 """ Establishes a connection to the MongoDB server. Use the MongoProxy library in order to automatically handle AutoReconnect exceptions in a graceful and reliable way. """

        mongodb_args = {
            'host': self.host,
            'port': self.port,
            'username': self._username,
            'password': self._password,
            'authSource': self._auth_source,
            'serverSelectionTimeoutMS': self._connect_timeout
        }

        if self._auth_mechanism is not None:
            mongodb_args['authMechanism'] = self._auth_mechanism

        self._client = MongoClient(**mongodb_args)

        if self._handle_reconnect:
            self._client = MongoClientProxy(self._client)