


Inventory of 12 variables in the sys library of the Python programming language
1. Concept
This is a standard library closely related to the Python interpreter.
import sys print sys.__doc__
shows the basic documentation of sys. Look at the first sentence, which summarizes the basic features of this module.
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
2. path
The search path of the module.
print(sys.path)
The first path in the list represents the current path.
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
4. executable
可执行的二进制文件的绝对路径。
print(sys.executable)
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
6. floatreprstyle
字符串表示浮点的repr方法。
print(sys.float_repr_style)
7. maxsize
最大支持的长度。
print(sys.maxsize)
8. maxunicode
最大编码点
print(sys.maxunicode)
9. platform
平台标识符
print(sys.platform)
结果为windows64位的操作系统。
10. prefix
python库
print(sys.prefix) #返回的是python库的路径
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
12. version
Python当前版本。
print(sys.version)
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!

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

AI Hentai Generator
Generate AI Hentai for free.

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



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 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.

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 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.

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

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

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){

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.
