python实现从字符串中找出字符1的位置以及个数的方法，python字符串

#!/bin/env python
#-*- coding:utf-8 -*-
#
"""
  用enumerate将string中的1都找出来,
  用enumerate实现：
"""
def get_1_pos(string):
  onePos=[]
  try:
    onePos=list(((pos,int(val)) for pos,val in enumerate(string) if val == '1'))
  except:
    pass
  return onePos

def get_1_num(string):
  return len(list(get_1_pos(string)))

def get_char_pos(string,char):
  chPos=[]
  try:
    chPos=list(((pos,char) for pos,val in enumerate(string) if(val == char)))
  except:
    pass
  return chPos
def get_char_num(string,char):
  return len(list(get_char_pos(string,char)))

if(__name__ == "__main__"):
  str0="10101010101010101"
  str1="123abc123abc123abc"
  lt=get_1_pos(str0)
  print(lt)
  lt=get_1_pos(str1)
  print(lt)
  num=get_1_num(str0)
  print(num)
  lt=get_char_pos(str1,'1')
  print(lt)
  num=get_char_num(str1,'1')
  print(num)