search
What is a .pyc fileMar 20, 2019 am 11:33 AM

The pyc file is a file generated by compiling a Python file. After the py file is compiled into a pyc file, it loads faster and improves the security of the code. The content of pyc is related to the version of python. The pyc files compiled by different versions are different

What is a .pyc file

[Recommended course: Python tutorial]

What is a pyc file

pyc is a binary file, which is a file generated by compiling a Python file. It is a byte code, Python After the file is turned into a pyc file, the loading speed is improved, and pyc is also a cross-platform bytecode, which is executed by the python virtual machine, which is similar to the concept of JAVA or .NET virtual machine. The content of pyc is related to the version of python. The pyc files compiled by different versions are different. For example, version 2.5 compiles pyc files, while python compiled by version 2.4 cannot be executed.

Why do we need a pyc file

Because the py file can directly see the source code, but under normal circumstances it is impossible for commercial software developed to leak the source code directly, so we need to compile it into pyc file to protect the source code. In addition, pyc files can also be decompiled. The pyc files compiled by different versions are different. This is mainly determined based on the opcode provided in the Python source code.

Generate a single pyc file

Python is a good language. It provides a built-in class library to compile py files into pyc files. This module It's the py_compile module. Next, I will explain how to generate a single pyc file

import py_compile
py_compile.compile(r'H:/game/test.py')

The method used is very simple. As shown above, a py file can be compiled into a pyc file directly in idle (assuming that Windows environment)

compile function syntax:

compile(file[, cfile[, dfile[, doraise]]])

file: indicates the path of the py file that needs to be compiled

cfile: indicates after compilation The pyc file name and path, the default is to add c or o directly after the file file name, o represents the optimized bytecode

dfile: refers to the path where the error message is saved

doraise : There are two values, which are true or false. If it is true, a PyCompileError will be raised. Otherwise, if there is an error in the compiled file, there will be an error, which will be displayed in sys.stderr by default without raising an exception

Generate pyc files in batches

Generally in the project, we will not just compile one py file, but need to compile all the py files in the entire folder into pyc files. This We can achieve this through the following methods:

import compileall
compileall.compile_dir(r'H:/game')

It means that the py files in the game directory and its subdirectories are compiled into pyc files

compileall function syntax:

compile_dir(dir[, maxlevels[, ddir[, force[, rx[, quiet]]]]])

dir: Indicates the location of the folder that needs to be compiled

maxlevels: Indicates the number of levels of subdirectories that need to be recursively compiled. The default is 10 levels, that is, the default will be The py files in the 10th layer subdirectory are compiled into pyc

ddir: Indicates the path where the error message is saved

force: When true, it means that it will be forcibly compiled into a pyc file, even if the pyc file is The latest one will still be forced to compile once

rx: Indicates a regular expression that can exclude unwanted directories, or only directories that meet the conditions will be compiled

quiet: When True When compiled, no information will be printed in the standard output after compilation

Summary: The above is the entire content of this article, I hope it will be helpful to everyone

The above is the detailed content of What is a .pyc file. For more information, please follow other related articles on the PHP Chinese website!

Statement
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
How to solve the permissions problem encountered when viewing Python version in Linux terminal?How to solve the permissions problem encountered when viewing Python version in Linux terminal?Apr 01, 2025 pm 05:09 PM

Solution to permission issues when viewing Python version in Linux terminal When you try to view Python version in Linux terminal, enter python...

How Do I Use Beautiful Soup to Parse HTML?How Do I Use Beautiful Soup to Parse HTML?Mar 10, 2025 pm 06:54 PM

This article explains how to use Beautiful Soup, a Python library, to parse HTML. It details common methods like find(), find_all(), select(), and get_text() for data extraction, handling of diverse HTML structures and errors, and alternatives (Sel

Serialization and Deserialization of Python Objects: Part 1Serialization and Deserialization of Python Objects: Part 1Mar 08, 2025 am 09:39 AM

Serialization and deserialization of Python objects are key aspects of any non-trivial program. If you save something to a Python file, you do object serialization and deserialization if you read the configuration file, or if you respond to an HTTP request. In a sense, serialization and deserialization are the most boring things in the world. Who cares about all these formats and protocols? You want to persist or stream some Python objects and retrieve them in full at a later time. This is a great way to see the world on a conceptual level. However, on a practical level, the serialization scheme, format or protocol you choose may determine the speed, security, freedom of maintenance status, and other aspects of the program

How to Perform Deep Learning with TensorFlow or PyTorch?How to Perform Deep Learning with TensorFlow or PyTorch?Mar 10, 2025 pm 06:52 PM

This article compares TensorFlow and PyTorch for deep learning. It details the steps involved: data preparation, model building, training, evaluation, and deployment. Key differences between the frameworks, particularly regarding computational grap

Mathematical Modules in Python: StatisticsMathematical Modules in Python: StatisticsMar 09, 2025 am 11:40 AM

Python's statistics module provides powerful data statistical analysis capabilities to help us quickly understand the overall characteristics of data, such as biostatistics and business analysis. Instead of looking at data points one by one, just look at statistics such as mean or variance to discover trends and features in the original data that may be ignored, and compare large datasets more easily and effectively. This tutorial will explain how to calculate the mean and measure the degree of dispersion of the dataset. Unless otherwise stated, all functions in this module support the calculation of the mean() function instead of simply summing the average. Floating point numbers can also be used. import random import statistics from fracti

Scraping Webpages in Python With Beautiful Soup: Search and DOM ModificationScraping Webpages in Python With Beautiful Soup: Search and DOM ModificationMar 08, 2025 am 10:36 AM

This tutorial builds upon the previous introduction to Beautiful Soup, focusing on DOM manipulation beyond simple tree navigation. We'll explore efficient search methods and techniques for modifying HTML structure. One common DOM search method is ex

What are some popular Python libraries and their uses?What are some popular Python libraries and their uses?Mar 21, 2025 pm 06:46 PM

The article discusses popular Python libraries like NumPy, Pandas, Matplotlib, Scikit-learn, TensorFlow, Django, Flask, and Requests, detailing their uses in scientific computing, data analysis, visualization, machine learning, web development, and H

How to Create Command-Line Interfaces (CLIs) with Python?How to Create Command-Line Interfaces (CLIs) with Python?Mar 10, 2025 pm 06:48 PM

This article guides Python developers on building command-line interfaces (CLIs). It details using libraries like typer, click, and argparse, emphasizing input/output handling, and promoting user-friendly design patterns for improved CLI usability.

See all articles

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)
3 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
3 weeks agoBy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
3 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

SublimeText3 English version

SublimeText3 English version

Recommended: Win version, supports code prompts!

mPDF

mPDF

mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

SAP NetWeaver Server Adapter for Eclipse

SAP NetWeaver Server Adapter for Eclipse

Integrate Eclipse with SAP NetWeaver application server.

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

MantisBT

MantisBT

Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.