将[{},{}]转为dict
妙音
posted @ 2013年11月14日 21:31
in python
, 3016 阅读
经常遇到一种需求，需要把从数据库取出的数据，转为dict对象([{}, {},...]-->dict)。
rs = [{"user_id":111, "name":"abc"}, {"user_id":123, "name":"edf"}]
print dict(map(lambda r:[r["user_id"], r], rs))
>>{111: {'user_id': 111, 'name': 'abc'}, 123: {'user_id': 123, 'name': 'edf'}}
上面看起来比较啰嗦，换一种写法
print dict([r["user_id"], r] for r in rs)
更简洁的写法
{r['user_id'] : r for r in rs}
2013年11月14日 21:59
{r['user_id']: r for r in rs}
好像是 Python 2.7+ 支持。
2013年11月18日 09:28
@依云: 谢谢，这个特性很好用
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