indexes.py 文件源码

def explicit_key(index):
    if isinstance(index, (list, tuple)):
        assert len(index) == 2, 'Must be a (`key`, `direction`) tuple'
        return index
    elif index.startswith('+'):
        return (index[1:], ASCENDING)
    elif index.startswith('-'):
        return (index[1:], DESCENDING)
    elif index.startswith('$'):
        return (index[1:], TEXT)
    elif index.startswith('#'):
        return (index[1:], HASHED)
    else:
        return (index, ASCENDING)