将用户输入的原始字符串和目标子字符串分别赋值给original_string和target_string变量。 2. 使用str.find()查找子字符串的首次出现位置 接下来,我们使用str.find()函数来查找目标子字符串在原始字符串中的首次出现位置。 # 使用str.find()查找子字符串的首次出现位置first_occurrence=original_string.find(target_stri...
不同的是,如果字符不存在于字符串中,find()方法将返回-1,而不会引发异常。 string="Hello, World!"char="o"index=string.find(char)ifindex!=-1:print(f"The first occurrence of '{char}' is at index{index}")else:print(f"'{char}' is not found in the string.") 1. 2. 3. 4. 5. 6....
2. rfind(“string”, beg, end):- 这个函数和 find()有几乎相同的功能, 但是它返回子字符串的结束位置索引。 # Python code to demonstrate working of# find() and rfind()str="geeksforgeeks is for geeks"str2 ="geeks"# using find() to find first occurrence of str2# returns 8print("The f...
2. Using theindex()Method (For Finding the First Occurrence) Theindex()method is used to find the index of the first occurrence of a specified element in a list. This method is particularly useful when you need to know the position of a specific element within a list. Here’s an exampl...
Thefind()method returns the index of first occurrence of the substring (if found). If not found, it returns-1. Example message ='Python is a fun programming language' # check the index of 'fun'print(message.find('fun')) # Output: 12 ...
str.find(sub[, start[, end]])在字符串中查找sub,找到后返回位置,没找到返回-1. 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...
将String 变量转换为 float、int 或 boolean 向字符串填充或添加零的不同方法 去掉字符串中的 space 字符 生成N个字符的随机字符串 以不同的方式反转字符串 将Camel Case 转换为 Snake Case 并更改给定字符串中特定字符的大小写 检查给定的字符串是否是 Python 中的回文字符串 ...
❮ String Methods ExampleGet your own Python Server Where in the text is the word "welcome"?: txt ="Hello, welcome to my world." x = txt.find("welcome") print(x) Try it Yourself » Definition and Usage Thefind()method finds the first occurrence of the specified value. ...
s.endswith(suffix) # Check if string ends with suffix s.find(t) # First occurrence of t in s s.index(t) # First occurrence of t in s s.isalpha() # Check if characters are alphabetic s.isdigit() # Check if characters are numeric s.islower() # Check if characters are lower-case...
Write a Python program to find the first repeated character in a given string where the index of the first occurrence is smallest.Visual Presentation:Sample Solution:Python Code:# Define a function that finds the first repeated character in a string with the smallest distance between the ...