<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get_operation_pattern(server_url, request_url_pattern):
 """Return an updated request URL pattern with the server URL removed."""

    if server_url[-1] == "/":
        # operations have to start with a slash, so do not remove it
        server_url = server_url[:-1]
    if is_absolute(server_url):
        return request_url_pattern.replace(server_url, "", 1)
    return path_qs(request_url_pattern).replace(server_url, "", 1)