下面是一个代码示例,演示了如何使用列表推导式查找字符串中多次出现的位置: deffind_all_occurrences(string,sub_string):return[indexforindex,charinenumerate(string)ifchar==sub_string]# 示例用法string="abracadabra"sub_string="a"occurrences=find_all_occurrences(string,sub_string)print(occurrences)# 输出 [...
=-1:# 将子串的位置添加到列表中occurrences.append(index)# 从上一次找到的位置的下一个位置继续查找index=string.find(substring,index+1)returnoccurrences# 输入字符串和子串string=input("请输入字符串:")substring=input("请输入子串:")# 查找子串在字符串中的全部位置occurrences=find_all_occurrences(string,...
string = "test test test test" print string.find('test') # 0 print string.rfind('test') # 15 #this is the goal print string.find_all('test') # [0,5,10,15] For counting the occurrences, see Count number of occurrences of a substring in a string. python string Share Improve th...
Use thestring.count()Function to Find All Occurrences of a Substring in a String Thestring.count()is a Python built-in function that returns the number of occurrences of a substring in a given particular string. Moreover, it has additional parametersstartandendto specify the indices of startin...
findall Find all occurrences of a patternina string. finditer Return an iterator yielding a match objectforeach match. compile Compile a pattern into a RegexObject. purge Clear the regular expression cache. escape Backslash all non-alphanumericsina string. ...
Or it can be done by trick use of regular expressions, as can be seen at How to use regex to find all overlapping matches - and it can also make for fine code golfing. This is my "hand made" count for overlapping occurrences of patterns in a string which tries not to be extremely ...
| 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. | | decode(...) | S.decode([encoding[,errors]]) - > object ...
>>> text = 'Today is 3/27/2018. Tomorrow is 3/28/2018.' >>> # Find all occurrences of a date >>> import re >>> re.findall(r'\d+/\d+/\d+', text) ['3/27/2018', '3/28/2018'] >>> # Replace all occurrences of a date with replacement text >>> re.sub(r'(\d+)...
字符串或串(String)是由数字、字母、下划线组成的一串字符。一般记为 s=“a1a2···an”(n>=0)。它是编程语言中表示文本的数据类型。在程序设计中,字符串(string)为符号或数值的一个连续序列,如符号串(一串字符)或二进制数字串(一串二进制数字)。
There are 2 occurrences.在这种方法中，子串是整个单词、短语、字母还是字符或数字的任意组合都没有关系...