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 usecount() functionto find the number of occurrences of a substring in the string. s = 'My Name is Pankaj' print('Substring count =', s...
字符串包含判断操作符:in,notin "He"instr "she"notinstr string模块,还提供了很多方法,如 S.find(substring, [start [,end]])#可指范围查找子串,返回索引值,否则返回-1 S.rfind(substring,[start [,end]])#反向查找 S.index(substring,[start [,end]])#同find,只是找不到产生ValueError异常 S.rindex(...
File "", line 1, in <module> ValueError: substring not found >>> str.index("n") #同find类似,返回第一次匹配的索引值 4 >>> str.rindex("n") #返回最后一次匹配的索引值 11 >>> str.count('a') #字符串中匹配的次数 0 >>> str.count('n') #同上 2 >>> str.replace('EAR','ear...
Thefind,rfind,indexandrindexmethods are used to find substrings in a string. They return the index of the first occurrence of the substring. Thefindandindexmethods search from the beginning of the string. Therfindandrindexsearch from the end of the string. The difference between thefindandindexme...
Return the lowest index in the string where substring sub is found, such that sub is contained in the range [start, end]. Optional arguments start and end are interpreted as in slice notation. Return -1 if sub is not found. str.format(format_string, *args, **kwargs) ...
Python Copy word[-2] # Second-to-last character.The output is:Output Copy 'o' SlicesPython supports both indexing, which extracts individual characters from a string, and slicing, which extracts a substring (or slice). To slice, you indicate a range in the format start:end. The start...
varstr="Apples are round, and apples are juicy.";varsplitted=str.split(" ",3);console.log(splitted)// [ 'Apples', 'are', 'round,' ] 12.substr() 从起始索引号提取字符串中指定数目的字符。 13.substring() 提取字符串中两个指定的索引号之间的字符。
Python Code: # Define a string 'str1' with a sentence.str1='The quick brown fox jumps over the lazy dog.'# Print an empty line for spacing.print()# Count and print the number of occurrences of the substring "fox" in the string 'str1'.print(str1.count("fox"))# Print an empty...
In this tutorial, you'll learn how to remove or replace a string or substring. You'll go from the basic string method .replace() all the way up to a multi-layer regex pattern using the sub() function from Python's re module.
Theinoperator checks if a substring is present in a string and returns a boolean value. Thefind()method returns the index of the first occurrence of the substring, or -1 if it’s not found. text="Learning Python is fun!"substring="Python"iftext.find(substring)!=-1:print(f'"{text}"...