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(substring)]==substring:# 判断当前字符后续字符是否与子字符...
2,index s = "你好,世界!" # 使用index()方法获取字符串中指定字符的索引 index_of_char = s.index('好') print(index_of_char) # 输出: 1 # 使用index()方法获取字符串中指定子串的索引 index_of_substring = s.index('你好') print(index_of_substring) # 输出: 0 1. 2. 3. 4. 5. 6. ...
2,index 代码语言:javascript 复制 s="你好,世界!"#使用index()方法获取字符串中指定字符的索引 index_of_char=s.index('好')print(index_of_char)# 输出:1#使用index()方法获取字符串中指定子串的索引 index_of_substring=s.index('你好')print(index_of_substring)# 输出:0 3,count,len count用来统计...
# Function to find index of substringdeffind_Index(str1,pos):# Check if pos longer than str1iflen(pos)>len(str1):return'Not found'# Iterate through str1foriinrange(len(str1)):# Iterate through posforjinrange(len(pos)):# If match found, return indexifstr1[i+j]==pos[j]andj=...
substring：要查找的子字符串。start（可选）：开始查找的起始位置，默认为 0。end（可选）：结束查找的位置，默认为字符串的长度。示例：1. 查找子字符串：text = "Hello, world! This is an example."# 使用 find 查找子字符串index = text.find("world")print("Index of 'world':", index) # 输出...
A substring is the part of a string. Python string provides various methods to create a substring, check if it contains a substring, index of substring etc. …
# find the index of isresult = text.index('is') print(result)# Output: 7 Run Code index() Syntax It's syntax is: str.index(sub[, start[, end]] ) index() Parameters Theindex()method takes three parameters: sub- substring to be searched in the stringstr. ...
first_of 返回值是所查找的这个字符的起始地址 例如s="abcde"s.index('b')返回的应该是1，因为从0开始算地址对吧 String[x:y]这种方法其实就是截取字符，类似其他语言的substr，substring之类的 例如s="abcde"s[2:]的结果是cde，s[:2]的结果是ab firstpos+1应该是为了绕开'['这个字符 ...
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...
substring(4); if(master_name != 'root'){ $(".grid-item a").each(function(index, element) { $(this).attr('href','#'); }); }59、获取公众号关注url在微信网页版,打开公众号,点击右上角“…”,在弹框中选择右下角中间的“查看历史记录”,然后在弹框中选择左上角倒数第一个,“用默认浏览...