Python：如何获取字符串的索引

Question

我如何编写一个不使用索引方法又返回一个字符串中单个字符的索引的函数，也就是使用string.index('some random character') ？

Answer 1

Another variant that works with multiple occurrences of char in string.

def idx(string, char):
  for key, x in enumerate(string):
    if x == char:
      print key

Answer 2

index（）与find（）相同，除了找不到字符串时的错误。

Answer 3

it's a school task?

def ind(the_string, the_char):
   i = 0
   for a_char in the_string:
       if a_char == the_char: return i
       i += 1
   return -1