下面是将以上四个步骤整合在一起的完整代码示例: 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(sub
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...
a nice string representation of the object. | If the argument is a string, the return value is the same object. | | Method resolution order: | str | basestring | object | | Methods defined here: | | __add__(...) | x.__add__(y) <==> x+y | | __contains__(...) | x...
Note that find() function returns the index position of the substring if it’s found, otherwise it returns -1. Count of Substring Occurrence We can use count() function to find the number of occurrences of a substring in the string. s = 'My Name is Pankaj' print('Substring count =...
substring = 'Python' substring in string2 (4)索引(Indexing) 使用方括号和索引可以获取字符串中特定位置的字符。索引从 0 开始。 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。
print(find_Index("Python Exercises", "yt")) print(find_Index("Python Exercises", "PY")) Sample Output: 7 1 Not found Flowchart: For more Practice: Solve these Related Problems: Write a Python program to find the starting index of a given substring in a string and return "Not found" ...
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2. Substring or slicing 通过使用slice语法,我们可以获得一系列字符。索引从零开始。 str[m:n] 从位置2(包括)到5(不包括)返回字符串。 从索引2到5的子字符串 str='hello world'print(str[2:5])# llo 负切片将从末尾返回子字符串。 子串从索引-5到-2 ...
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() -> ...
需要再次提醒大家注意的是,在进行索引运算时,如果索引越界,会引发IndexError异常,错误提示信息为:string index out of range(字符串索引超出范围)。 字符的遍历 如果希望遍历字符串中的每个字符,可以使用for-in循环,有如下所示的两种方式。 方式一: s = 'hello' for i in range(len(s)): print(s[i]) 方式...