def get_ws_blobs(blob_names=None):
    ''' Get blobs in 'blob_names' in the default workspace,
        get all blobs if blob_names is None '''
    blobs = {}
    if blob_names is None:
        blob_names = workspace.Blobs()
    blobs = {x: workspace.FetchBlob(x) for x in blob_names}

    return blobs
 Get blobs in 'blob_names' in the default workspace,
        get all blobs if blob_names is None 
detectron/utils/model_convert_utils.py