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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 register_connection(self, alias, api_key, base_url, timeout=5):
 """ Create and register a new connection. :param alias: The alias of the connection. If not changed with `switch_connection`, the connection with default 'alias' is used by the resources. :param api_key: The private api key. :param base_url: The api url including protocol, host, port (optional) and location. :param timeout: The time in seconds to wait for 'connect' and 'read' respectively. Use a tuple to set these values separately or None to wait forever. :return: """

        if not base_url.endswith('/'):
            base_url += '/'

        self._connections[alias] = Connection(api_key, base_url, timeout)