formatting.py 文件源码

def format_tags(obj, defaults=None):
    result = set()
    for src in (obj, defaults):
        if isinstance(src, Mapping):
            result.update(['%s:%s' % (k, v) for k, v in src.items()])
        elif isinstance(src, list):
            result.update(src)
        elif isinstance(src, str):
            result.add(src)
    return sorted(result)