Python简单实现两个任意字符串乘积的方法示例

#!usr/bin/env python
#encoding:utf-8
'''''
__Author__:沂水寒城
功能：两个任意字符串乘积
'''
def two_strs_mutiply(one_str, two_str):
  '''''
  '''
  if one_str[0]=='-':
    flag1=-1
    one_str=one_str[1:]
  else:
    flag1=1
  if two_str[0]=='-':
    flag2=-1
    two_str=two_str[1:]
  else:
    flag2=1
  if one_str=='0' or two_str=='0':
    return 0
  else:
    one=int(one_str)
    two=int(two_str)
    res=one*two*flag1*flag2
    return res
if __name__ == '__main__':
  one_str_list=['0','120','20','43','89765432138','98594','98765432123']
  for i in range(len(one_str_list)-1):
    one_str,two_str=one_str_list[i],one_str_list[i+1]
    print one_str,two_str,'----->',two_strs_mutiply(one_str,two_str)