<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def delete_key(self, key_id):
 """Delete the key with the specified id from your deploy keys list. :returns: bool -- True if successful, False otherwise """

        if int(key_id) <= 0:
            return False
        url = self._build_url('keys', str(key_id), base_url=self._api)
        return self._boolean(self._delete(url), 204, 404)