Python re.sub在将多个参数传递给函数的for循环中不起作用

Question

I am trying to change multiple string values within a single string by defining a function that passes arguments to re.sub via a for loop.

For some reason when I pass the arguments into re.sub, it has no effect on the string, but if I run the exact same syntax outside of the loop with single argument the regex perfroms as expected. Am I missing something here?

import re

#This is my function:

def mult(string, *args):

    for arg in args:

      result = re.sub(arg, '', string)

    return result

path = 'file://Volumes/MyDrive/iTunes/Music.mp3'

print(mult(path, '\'file:/\'')) 
#produces no change to the string


#This is the normal re.sub which works fine:

print(re.sub('file:/', '', path))

Answer 1

Use this :

import re



def mult(string, *args):

    for arg in args:

      result = re.sub(arg, '', string)

      return result

path = 'file://Volumes/MyDrive/iTunes/Music.mp3'

print(mult(path, 'file:/')) 
#Notice the change to the args. Your string is wrong.

Yields:

/Volumes/MyDrive/iTunes/Music.mp3