在Python中进入方括号

Question

我有这根绳子。在

"ascascascasc[xx]asdasdasdasd[yy]qweqweqwe"

我想把字符串放在括号里。像这样

^{pr2}$

我试过了，但没用：

a = "ascascascasc[xx]asdasdasdasd[yy]qweqweqwe"
listinside = []
for i in range(a.count("[")):
    listinside.append(a[a.index("["):a.index("]")])
print (listinside)

输出：

['[xx', '[xx']

Answer 1

您不需要count，可以使用regex，re.findall()可以：

>>> s="ascascascasc[xx]asdasdasdasd[yy]qweqweqwe"
>>> import re
>>> re.findall(r'\[(.*?)\]',s)
['xx', 'yy']

\[ matches the character [ literally

*? matches Between zero and unlimited times, as few times as possible, expanding as needed [lazy]

\] matches the character ] literally

DEMO