Python 字典如何选择几个给定的 key，生成新的字典？

This topic created in 2488 days ago, the information mentioned may be changed or developed.

比如：
data= {'a': 1, 'b': 2, 'c': 3, 'd': 4}
select(data, ['a', 'b']) == {'a': 1, 'b': 2}

Data

字典

Python

select

4 replies • 2019-08-04 00:47:06 +08:00

1

ZeldaPeach

Aug 3, 2019

{k: data[k] for k in ('a','b')}

2

Trim21

Aug 3, 2019 via Android

用字典生成式

3

Sylv

Aug 3, 2019

new_keys = ['a', 'b']
new_data = {key: data[key] for key in new_keys}

4

shanguo

Aug 4, 2019

>>> def select(src_dict, keys):
... return {k: src_dict[k] for k in keys if src_dict.get(k)}
...
>>> d = dict(name='jok', age=20)
>>> select(d, ['name'])
{'name': 'jok'}