История изменений

Исправление Deleted, 18.08.15 17:17 (текущая версия) :

import re

def subn(string, old, new, pos):
    count = 0
    def subber(match):
        nonlocal count
        count += 1
        if count == pos:
            return new
        else:
            return old
    return re.sub(old, subber, string)

Исходная версия Deleted, 18.08.15 17:12:

def subn(string, old, new, pos):
    count = 0
    def subber(match):
        nonlocal count
        count += 1
        if count == pos:
            return new
        else:
            return old
    return re.sub(old, subber, string)