human
Complete the below
def get_versions(module=None):

    ''''Returns a list of versions for a given module.
    Args:
    module: Module to retrieve version for, if None then the current module will
    be used.
    Returns:
    List of strings containing the names of versions associated with the module.
    The current version will also be included in this list.
    Raises:
    InvalidModuleError if the given module isn\'t valid, TransientError if there
    is an issue fetching the information.'
    '''

=====
What is a the Python program you requested?
assistant
#Here is the Python program you requested.
    def _ResultHook(rpc):
        mapped_errors = [modules_service_pb.ModulesServiceError.INVALID_MODULE, modules_service_pb.ModulesServiceError.TRANSIENT_ERROR]
        _CheckAsyncResult(rpc, mapped_errors, {})
        return list(rpc.response.version_list())
    request = modules_service_pb.GetVersionsRequest()
    if module:
        request.set_module(module)
    response = modules_service_pb.GetVersionsResponse()
    return _MakeAsyncCall('GetVersions', request, response, _ResultHook).get_result()