Theindex()method is almost the same as thefind()method, the only difference is that thefind()method returns -1 if the value is not found. (See example below) Syntax string.index(value, start, end) Parameter Values ParameterDescription ...
index() Return Value If substring exists inside the string, it returns the lowest index in the string where substring is found. If substring doesn't exist inside the string, it raises aValueErrorexception. Theindex()method is similar to thefind()method for strings. The only difference is that...
Theindexmethod in particular, returns the index of the given substring, inside the string.The substring that we pass, can be as long or as short as we want.And what happens if the string doesn’t have the substring we’re looking for?The index method can’t return a number because the...
Python3 index()方法Python3 字符串描述index() 方法检测字符串中是否包含子字符串 str ,如果指定 beg(开始) 和 end(结束) 范围,则检查是否包含在指定范围内,该方法与 python find()方法一样,只不过如果str不在 string中会报一个异常。语法index()方法语法:...
python string源码分析 python string method 1. str.capitalize() # 将字符串的第一个字母变成大写,其他字母变小写。对于 8 位字节编码需要根据本地环境 >>> 'hello'.capitalize() 'Hello' >>> 'hEllo'.capitalize() 'Hello 1. 2. 3. 4. 5....
print string.whitespace 2. string Method(方法) Below are listed the string methods which both 8-bit strings and Unicode objects support. Note that none of these methods take keyword arguments. In addition,Python’s strings support the sequence type methods described in the Sequence Types — str...
String MethodsPython has a set of built-in methods that you can use on strings.Note: All string methods return new values. They do not change the original string.MethodDescription capitalize() Converts the first character to upper case casefold() Converts string into lower case center() ...
方法(method)和函数(function)大体来说是可以互换的两个词,它们之间有一个细微的区别:函数是独立的功能,需要将数据或者参数传递进去进行处理。方法则与对象有关,不需要传递数据或参数就可以使用。举个例子,前面我们讲到的type()就是一个函数,你需要将一个变量或者数据传入进去它才能运作并返回一个值,举例如下: ...
string[index] 除可获取单个字符之外,Python 也可以在方括号中使用范围来获取字符串的中间“一段”(被称为子串),其基本语法格式为: string[start : end : step] [root@kube str_method]#cat demo1.py#coding:utf-8s='Configuring the BIG-IP system to log to a remote syslog server'print(s[1])#使用...
在python有各种各样的string操作函数。在历史上string类在python中经历了一段轮回的历史。在最开始的时候,python有一个专门的string的module,要使用string的方法要先import,但后来由于众多的python使用者的建议,从python2.0开始,string方法改为用S.method()的形式调用,只要S是一个字符串对象就可以这样使用,而不用import...