python - 字符串转换列表

Question

a=("[{'aa':11,'bb':22,'cc':33},{'aa':44,'bb':55,'cc':66}]")
如何将a转换成列表
再将a[0]【'aa'】的值打印出来

Answer 1

python3

>>> a=("[{'aa':11,'bb':22,'cc':33},{'aa':44,'bb':55,'cc':66}]")
>>> a
"[{'aa':11,'bb':22,'cc':33},{'aa':44,'bb':55,'cc':66}]"
>>> eval(a)
[{'cc': 33, 'aa': 11, 'bb': 22}, {'cc': 66, 'aa': 44, 'bb': 55}]
>>> _[0]
{'cc': 33, 'aa': 11, 'bb': 22}

Answer 2

import json
a=('[{"aa":11,"bb":22,"cc":33},{"aa":44,"bb":55,"cc":66}]')
b = json.loads(a)
b[0]['aa']
# 11

对你的a变量做了一点改动。

Answer 3

b = json.loads(a)
b[0]不就可以了吗？