AI检测代码解析 defindex_of_substring(string,substring):string_list=list(string)forindex,charinenumerate(string_list):ifchar==substring[0]:# 判断当前字符是否与子字符串的第一个字符相同ifstring[index:index+len(substring)]==substring:# 判断当前字符后续字符是否与子字符串匹配returnindexreturn-1 1. 2....
首先,我们需要定义一个名为String的类,该类将包含一个名为indexOf的方法。以下是实现的代码示例: AI检测代码解析 classString:def__init__(self,value):self.value=valuedefindexOf(self,substring):returnself.value.find(substring) 1. 2. 3. 4. 5. 6. 在这个类中,我们首先定义了一个构造函数__init__...
Python String Substring count() function Output: Find all indexes of substring There is no built-in function to get the list of all the indexes for the substring. However, we can easily define one using find() function. def find_all_indexes(input_str, substring): l2 = [] length = len...
sub- substring to be searched in the stringstr. startandend(optional) - substring is searched withinstr[start:end] 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, i...
The index method can’t return a number because the substring isn’t there, so we get a value error instead: In order to avoid thisTraceback Error, we can use the keywordinto check if a substring is contained in a string. In the case of Loops, it was used for iteration, whereas in...
Return the number of non-overlapping occurrences of substring sub in string S[start:end]. Optional arguments start and end are interpreted as in slice notation."""return0#--- 大小写转化---#首字母大写defcapitalize(self):#real signature unknown; restored from __doc__"""S.capitalize() -> ...
一、string字符串 1.概述 由多个字母,数字,特殊字符组成的有限序列 在Python中,使用单引号或者双引号都可以表示字符串 注意:没有单符号的数据类型 示例: ‘a’ “a” 2.创建字符串 代码演示: str1 = "hello" str2 = "abc1234" str3 = "***fhhg%%%" ...
' stRINg lEArn' >>> >>> str.zfill(20) #str右对齐,左边填充0 '00000000stRINg lEArn' 大小写转换 >>> str='stRINg lEArn' >>> >>> str.upper() #转大写 'STRING LEARN' >>> >>> str.lower() #转小写 'string learn' >>> >>> str.capitalize() #字符串首为大写,其余小写 ...
index("c")) # 2 print(string.index("z")) # error 需要明确的是函数index的输入参数为需要查找的子串,它遍历整个字符串来寻找是否包含相应的子串,如果可以找到,就返回该子串首次出现的位置。如果不存在,则将触发以下错误: ValueError: substring not found 4.2 find函数 函数find的功能和函数index的功能...
char_at_index_2 = string1[2] # 结果为 'l' (5)切片(Slicing) 使用方括号和切片语法可以获取字符串的子串。 substring = string1[0:5] # 结果为 'Hello' (6)长度(Length) 使用len()函数可以获取字符串的长度。 length_of_string = len(combined_string) # 结果为 13 ...