python3 命令

常用示例

说明

python3 is the interpreter for the Python programming language, version 3.x. It executes Python code either interactively or from script files, supporting both procedural and object-oriented programming paradigms. When invoked without arguments, it starts an interactive REPL (Read-Eval-Print Loop) for experimenting with Python code. With a script file as argument, it executes the script. The -m option allows running installed modules as scripts, enabling functionality like starting HTTP servers, running tests, or managing packages with pip. Python 3 is the current major version of Python, featuring improved Unicode support, print as a function, integer division changes, and many other enhancements over Python 2 (which reached end-of-life in 2020).

参数

-c _command_

Execute Python code passed as a string

-m _module_

Run library module as a script

-i

Inspect interactively after running script

-B

Don't write .pyc bytecode files

-O

Optimize generated bytecode

-OO

Remove docstrings in addition to -O optimizations

-q

Don't print version and copyright on startup

-s

Don't add user site-packages to sys.path

-S

Don't import the site module

-u

Unbuffered binary stdout and stderr

-v

Verbose mode (trace import statements)

-V, --version

Print Python version and exit

-W _arg_

Warning control (error, ignore, always, default, module, once)

-X _option_

Set implementation-specific option

-h, --help

Print help message and exit

-E

Ignore PYTHON* environment variables