python str.find()底层用的什么算法

Question

如题所述

Answer 1

1、python 下面的str是一个类，里面包含各种方法，其中之一就是find（）
源码如下,这个类如果全部放上来，会超过最大字数限制，里面解释内容太多了

def find(self, sub, start=None, end=None): # real signature unknown; restored from __doc__
"""
B.find(sub[, start[, end]]) -> int

Return the lowest index in B where subsection sub is found,
such that sub is contained within B[start,end]. Optional
arguments start and end are interpreted as in slice notation.

Return -1 on failure.
"""
return 0