Python实现判断一个字符串是否包含子串的方法总结

> s='nihao,shijie'
> t='nihao'
> result = t in s
> print result
True

> import string
> s='nihao,shijie'
> t='nihao'
> result = string.find(s,t)!=-1
> print result
True
> result = string.rfind(s,t)!=-1
> print result
True

import string
def find_string(s,t):
  try:
    string.index(s,t)
    return True
  except(ValueError):
    return False
s='nihao,shijie'
t='nihao'
result = find_string(s,t)
print result #True

> s='nihao,shijie'
> t='nihao'
> result = s.find(t)>=0
> print result
True
> result=s.count(t)>0
> print result
True
> result=s.index(t)>=0
> print result
True