在“a”和“(”+2个未知字符+“)”之间找到substring

Question

I have some strings which are built this way:

string = "blabla y the_blabla_I_want (two_digits_number) blabla"

I would like to get the_blabla_I_want. I know the re.search can help but my problem is about how to represent (two_digits_number) .

Answer 1

To represent (two_digits_number) , you may use "\([0-9]{2}\)" .

Here is a regex tutorial in python.

To get the_blabla_I_want , you may try the following code:

import re
x = re.search("y (.*) \([0-9]{2}\)", str)
x[1]

Depends on how you define the two digits number, yo may want to change "\([0-9]{2}" to "\([1-9][0-9])" to avoid numbers have leading zero

Answer 2

string = "blabla y the_blabla_I_want (99) blabla"
if string.count("(") == 1 and string.count(")") == 1: 
    start_idx = string.find("(")
    end_idx = string.find(")")
    two_digits_number = string[start_idx+1:end_idx]
    print(two_digits_number) # output: 99
    two_digits_number = string[start_idx:end_idx+1]
    print(two_digits_number) # output: (99)