normalize spaces in a txt file

[thistle]

I want to write a function that takes a file and (corrects) deletes extra spaces after or before punctuations "() [] {} "" . , : ;! ? $" or add spaces where necessary.
example:
word .word should changes to word. word
word( word )word should changes to word (word) word

my code doesn't corrects the spaces!

import re
 
def c (file):
    with open ('c.txt')as f1:
        for line in f1:
           result = re.sub(r'\s([?.!(){}[]:;,"](?:\s|$))', r'\1', line)
           f2 = open ('zzzzz.txt', 'a')
           f2.write(result)
           print(result)