Home > Backend Development > Python Tutorial > What are the string manipulation functions in Python?

What are the string manipulation functions in Python?

王林
Release: 2023-10-18 11:48:29
Original
1264 people have browsed it

What are the string manipulation functions in Python?

As a powerful programming language, Python provides many useful string manipulation functions for processing and manipulating string data. This article will introduce commonly used string manipulation functions in Python and provide some specific code examples.

  1. len() function: used to calculate the length of a string.

Sample code:

string = "Hello, World!"
length = len(string)
print("字符串长度为:", length)  # 输出:字符串长度为: 13
Copy after login
  1. upper() and lower() methods: Convert strings to uppercase and lowercase letters respectively.

Sample code:

string = "Hello, World!"
print(string.upper())  # 输出:HELLO, WORLD!
print(string.lower())  # 输出:hello, world!
Copy after login
  1. strip() method: used to remove whitespace characters at both ends of the string.

Sample code:

string = "   Hello, World!   "
print(string.strip())  # 输出:Hello, World!
Copy after login
  1. find() and index() methods: used to find the position of the substring in the original string.

Sample code:

string = "Hello, World!"
print(string.find("World"))  # 输出:7
print(string.index("World"))  # 输出:7
Copy after login
  1. count() method: used to count the number of times a certain substring appears in the original string.

Sample code:

string = "Hello, World!"
print(string.count("o"))  # 输出:2
Copy after login
  1. replace() method: used to replace the specified substring in the string.

Sample code:

string = "Hello, World!"
new_string = string.replace("Hello", "Hi")
print(new_string)  # 输出:Hi, World!
Copy after login
  1. split() method: Split the string into substrings and return a list.

Sample code:

string = "Hello, World!"
strings_list = string.split(", ")
print(strings_list)  # 输出:['Hello', 'World!']
Copy after login
  1. join() method: Join strings in a list.

Sample code:

words = ['Hello', 'World!']
string = ", ".join(words)
print(string)  # 输出:Hello, World!
Copy after login
  1. isdigit() and isalpha() methods: Used to determine whether a string contains only numbers or letters.

Sample code:

string1 = "123"
string2 = "abc"
print(string1.isdigit())  # 输出:True
print(string2.isalpha())  # 输出:True
Copy after login

Summary: Python provides a wealth of string manipulation functions that can easily complete various string processing tasks. Mastering the usage of these functions is very important for string-related programming tasks. Through the introduction and code examples of this article, I hope readers can better understand and use string manipulation functions in Python.

The above is the detailed content of What are the string manipulation functions in Python?. For more information, please follow other related articles on the PHP Chinese website!

source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template