Table of Contents
1. Concept" >1. Concept
2. sys variables
" >2. sys variables
1. argv " >1. argv
2. path" >2. path
3. modules
" >3. modules
4. executable" >4. executable
5. float_info" >5. float_info
6. floatreprstyle" >6. floatreprstyle
7. maxsize" >7. maxsize
8. maxunicode" >8. maxunicode
9. platform" >9. platform
10. prefix
" >10. prefix
11. thread_info" >11. thread_info
12. version" >12. version
Home Backend Development Python Tutorial Inventory of 12 variables in the sys library of the Python programming language

Inventory of 12 variables in the sys library of the Python programming language

Jul 25, 2023 pm 05:11 PM
python

1. Concept

This is a standard library closely related to the Python interpreter.

import sys
print sys.__doc__
Copy after login

shows the basic documentation of sys. Look at the first sentence, which summarizes the basic features of this module.

Inventory of 12 variables in the sys library of the Python programming language

2. sys variables

1. argv

sys.argv is a variable, specially used to pass parameters to the Python interpreter, so it is called "command line parameter".

Method: sys.argvReturn value: list

import sys
print(sys.argv)
#该方法返回的列表中第一个元素为程序的路径,会把执行参数传入到列表中
Copy after login

Inventory of 12 variables in the sys library of the Python programming language

2. path

The search path of the module.

print(sys.path)
Copy after login

The first path in the list represents the current path.

Inventory of 12 variables in the sys library of the Python programming language

3. modules

模块路径字典。

print(sys.modules)
#该方法返回一个字典,模块名为key,模块路径为value
Copy after login

Inventory of 12 variables in the sys library of the Python programming language

4. executable

可执行的二进制文件的绝对路径。

print(sys.executable)
Copy after login

Inventory of 12 variables in the sys library of the Python programming language

5. float_info

浮点信息的结构

print(sys.float_info)
#返回浮点信息的限定范围
Copy after login

Inventory of 12 variables in the sys library of the Python programming language

6. floatreprstyle

字符串表示浮点的repr方法。

print(sys.float_repr_style)
Copy after login

Inventory of 12 variables in the sys library of the Python programming language

7. maxsize

最大支持的长度。

print(sys.maxsize)
Copy after login

Inventory of 12 variables in the sys library of the Python programming language

8. maxunicode

最大编码点

print(sys.maxunicode)
Copy after login

Inventory of 12 variables in the sys library of the Python programming language

9. platform

平台标识符

print(sys.platform)
Copy after login

结果为windows64位的操作系统。

Inventory of 12 variables in the sys library of the Python programming language

10. prefix

python库

print(sys.prefix)
#返回的是python库的路径
Copy after login

Inventory of 12 variables in the sys library of the Python programming language

11. thread_info

线程的实现信息

print(sys.thread_info)
#该变量的使用同float_info类似
Copy after login

Inventory of 12 variables in the sys library of the Python programming language

12. version

Python当前版本。

print(sys.version)
Copy after login

Inventory of 12 variables in the sys library of the Python programming language

三、总结

本文基于Python基础,介绍了sys模块,介绍了12个sys的变量。对每个变量都采用图文结合的方式,进行详细的讲解。

The above is the detailed content of Inventory of 12 variables in the sys library of the Python programming language. For more information, please follow other related articles on the PHP Chinese website!

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

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. How to Fix Audio if You Can't Hear Anyone
4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Chat Commands and How to Use Them
4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

How to use Debian Apache logs to improve website performance How to use Debian Apache logs to improve website performance Apr 12, 2025 pm 11:36 PM

This article will explain how to improve website performance by analyzing Apache logs under the Debian system. 1. Log Analysis Basics Apache log records the detailed information of all HTTP requests, including IP address, timestamp, request URL, HTTP method and response code. In Debian systems, these logs are usually located in the /var/log/apache2/access.log and /var/log/apache2/error.log directories. Understanding the log structure is the first step in effective analysis. 2. Log analysis tool You can use a variety of tools to analyze Apache logs: Command line tools: grep, awk, sed and other command line tools.

Python: Games, GUIs, and More Python: Games, GUIs, and More Apr 13, 2025 am 12:14 AM

Python excels in gaming and GUI development. 1) Game development uses Pygame, providing drawing, audio and other functions, which are suitable for creating 2D games. 2) GUI development can choose Tkinter or PyQt. Tkinter is simple and easy to use, PyQt has rich functions and is suitable for professional development.

Laravel (PHP) vs. Python: Development Environments and Ecosystems Laravel (PHP) vs. Python: Development Environments and Ecosystems Apr 12, 2025 am 12:10 AM

The comparison between Laravel and Python in the development environment and ecosystem is as follows: 1. The development environment of Laravel is simple, only PHP and Composer are required. It provides a rich range of extension packages such as LaravelForge, but the extension package maintenance may not be timely. 2. The development environment of Python is also simple, only Python and pip are required. The ecosystem is huge and covers multiple fields, but version and dependency management may be complex.

PHP and Python: Comparing Two Popular Programming Languages PHP and Python: Comparing Two Popular Programming Languages Apr 14, 2025 am 12:13 AM

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

The role of Debian Sniffer in DDoS attack detection The role of Debian Sniffer in DDoS attack detection Apr 12, 2025 pm 10:42 PM

This article discusses the DDoS attack detection method. Although no direct application case of "DebianSniffer" was found, the following methods can be used for DDoS attack detection: Effective DDoS attack detection technology: Detection based on traffic analysis: identifying DDoS attacks by monitoring abnormal patterns of network traffic, such as sudden traffic growth, surge in connections on specific ports, etc. This can be achieved using a variety of tools, including but not limited to professional network monitoring systems and custom scripts. For example, Python scripts combined with pyshark and colorama libraries can monitor network traffic in real time and issue alerts. Detection based on statistical analysis: By analyzing statistical characteristics of network traffic, such as data

Nginx SSL Certificate Update Debian Tutorial Nginx SSL Certificate Update Debian Tutorial Apr 13, 2025 am 07:21 AM

This article will guide you on how to update your NginxSSL certificate on your Debian system. Step 1: Install Certbot First, make sure your system has certbot and python3-certbot-nginx packages installed. If not installed, please execute the following command: sudoapt-getupdatesudoapt-getinstallcertbotpython3-certbot-nginx Step 2: Obtain and configure the certificate Use the certbot command to obtain the Let'sEncrypt certificate and configure Nginx: sudocertbot--nginx Follow the prompts to select

How debian readdir integrates with other tools How debian readdir integrates with other tools Apr 13, 2025 am 09:42 AM

The readdir function in the Debian system is a system call used to read directory contents and is often used in C programming. This article will explain how to integrate readdir with other tools to enhance its functionality. Method 1: Combining C language program and pipeline First, write a C program to call the readdir function and output the result: #include#include#include#includeintmain(intargc,char*argv[]){DIR*dir;structdirent*entry;if(argc!=2){

Python and Time: Making the Most of Your Study Time Python and Time: Making the Most of Your Study Time Apr 14, 2025 am 12:02 AM

To maximize the efficiency of learning Python in a limited time, you can use Python's datetime, time, and schedule modules. 1. The datetime module is used to record and plan learning time. 2. The time module helps to set study and rest time. 3. The schedule module automatically arranges weekly learning tasks.

See all articles