# -*- coding: utf-8 -*-

#python 27

#xiaodeng

#python之函数用法startswith()

#http://www.runoob.com/python/att-string-startswith.html

#startswith()

#说明：返回布尔值,用于检查字符串是否是以指定子字符串开头，如果是则返回 True，否则返回 False。

'''

startswith(...)

    S.startswith(prefix[, start[, end]]) -> bool

    prefix:前缀

    start：字符串的开始位置

    end：字符串结束位置

    Return True if S starts with the specified prefix, False otherwise.

    With optional start, test S beginning at that position.

    With optional end, stop comparing S at that position.

    prefix can also be a tuple of strings to try.

'''

#案例

#判断字符串是否以指定字符串开头

str='xiaodeng love python'

prefix='xiaodeng'

print str.startswith(prefix)#True

prefix='deng'

print str.startswith(prefix,4)#True

prefix='love'

print str.startswith(prefix,4,13)#True