Python re.search字符串搜索打开和关闭括号[]

Question

Can someone explain me why my regex is not getting satisfied for below regex expression. Could someone let me know how to overcome and check for [] match.

>>> str = li= "a.b.\[c\]"
>>> if re.search(li,str,re.IGNORECASE):
...    print("Matched")
...
>>>
>>> str = li= r"a.b.[c]"
>>> if re.search(li,str,re.IGNORECASE):
...    print("Matched")
...
>>>

If I remove open and close brackets I get match

>>> str = li= 'a.b.c'
>>> if re.search(li,str,re.IGNORECASE):
...    print("matched")
...
matched

Answer 1

You are attempting to match the string ab\\\\[c\\\\] instead of ab[c] .
Try this:

import re
li= r"a\.b\.\[c\]"
s = "a.b.[c]"
if re.search(li, s, re.IGNORECASE):
    print("Matched")

re.IGNORECASE is not needed in here by the way.

Answer 2

You can try the following code:

import re
str = "a.b.[c]"
if re.search(r".*\[.*\].*", str):
   print("Matched")

Output:

Matched