从 Python 中的字符串中删除字母

Question

I need to define a function that takes two arguments (s1, s2) . This function should remove the letters of s2 that are in s1 . For example removing the letters "motor" from "motorcycle" should result in "cycle" . I know how to do it for a specific letter of one string, but not from two strings.

Answer 1

Do s2.replace(s1, '')

>>> a = 'motor'
>>> a.replace('moto', '')
'r'

Strings in Python are immutable, so to change the vale of a do -

>>> a =a.replace('moto', '')

Specifically for your problem

def replace_letters(x,y):
   return x.replace(y,'')