python study notes - StringIO and BytesIO
What we said before was reading and writing real files. In fact, we can also virtualize a file in memory for reading and writing. The official modules provided by Python to us are io.StringIO and io.BytesIO.
io.StringIO
String IO is used to read and write strings in memory. StringIO can be initialized by passing in a character. For example
string = StringIO("This is Demo")For example:
from io import StringIO
s = StringIO()
s.write("Yes\nYEs")
s.seek(0)
# 将指针拨回到开始位置，否则将会读取不到任何东西
content = s.read()
print contentStringIO creates a file-like object that has all the methods of File Object. StringIO also has two special methods, namely the getvalue() method and the close() method.
getvalue() method is used to obtain the content written in StringIO
close() method closes StringIO and releases memory.
io.BytesIO
StringIO can only process string type data, while BytesIO can be used to process binary type data. The usage of BytesIO is similar to StringIO
StringIO.StringIO
When searching for documents, I found that there is also a StringIO under StringIO, and the two are very similar. Googled everything. There is an answer on stackoverflow:
An in-memory stream for unicode text. It inherits TextIOWrapper.
This module implements a file-like class, StringIO, that reads and writes a string buffer ( also known as memory files).io.StringIO is a class. It handles Unicode. It reflects the preferred Python 3 library structure.
StringIO.StringIO is a class. It handles strings. It reflects the legacy Python 2 library structure.
What should be preferred?Always move forward toward the new library organization. The io.open should be used to replace the built-in Unicode-unaware open.
Forward. Move forward.
The general idea is that StringIO is the legacy of python2 and will be replaced by io.StringIO in the future. It is recommended to use io.StringIO.
More python study notes - For articles related to StringIO and BytesIO, please pay attention to the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1677
14
1431
52
1334
25
1279
29
1257
24
PHP and Python: Different Paradigms Explained
Apr 18, 2025 am 12:26 AM
PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.
Choosing Between PHP and Python: A Guide
Apr 18, 2025 am 12:24 AM
PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.
How to run sublime code python
Apr 16, 2025 am 08:48 AM
To run Python code in Sublime Text, you need to install the Python plug-in first, then create a .py file and write the code, and finally press Ctrl B to run the code, and the output will be displayed in the console.
PHP and Python: A Deep Dive into Their History
Apr 18, 2025 am 12:25 AM
PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.
Python vs. JavaScript: The Learning Curve and Ease of Use
Apr 16, 2025 am 12:12 AM
Python is more suitable for beginners, with a smooth learning curve and concise syntax; JavaScript is suitable for front-end development, with a steep learning curve and flexible syntax. 1. Python syntax is intuitive and suitable for data science and back-end development. 2. JavaScript is flexible and widely used in front-end and server-side programming.
Golang vs. Python: Performance and Scalability
Apr 19, 2025 am 12:18 AM
Golang is better than Python in terms of performance and scalability. 1) Golang's compilation-type characteristics and efficient concurrency model make it perform well in high concurrency scenarios. 2) Python, as an interpreted language, executes slowly, but can optimize performance through tools such as Cython.
Where to write code in vscode
Apr 15, 2025 pm 09:54 PM
Writing code in Visual Studio Code (VSCode) is simple and easy to use. Just install VSCode, create a project, select a language, create a file, write code, save and run it. The advantages of VSCode include cross-platform, free and open source, powerful features, rich extensions, and lightweight and fast.
How to run python with notepad
Apr 16, 2025 pm 07:33 PM
Running Python code in Notepad requires the Python executable and NppExec plug-in to be installed. After installing Python and adding PATH to it, configure the command "python" and the parameter "{CURRENT_DIRECTORY}{FILE_NAME}" in the NppExec plug-in to run Python code in Notepad through the shortcut key "F6".
