module

pip

Install

临时使用镜像源:

pip install pkg -i https://mirrors.tuna.tsinghua.edu.cn/pypi/web/simple

持久化设置镜像源:

pip config set global.index-url https://mirrors.tuna.tsinghua.edu.cn/pypi/web/simple

配置多个镜像源:

pip config set global.extra-url "<extra-url-1> <extra-url-2> ..."

安装本地whl:

1. 下载whl文件到本地
2. 运行pip install <path/to/whl>, 不需要其他参数指定

安装仓库(setup.py)

1. 本地仓库:

pip install -e .

2. 远程仓库 使用git下载到本地, 或者使用:

pip install "git+https://github.com/.../..."

更新方式:

python -m pip install --upgrade pip

requirements.txt

some project has their own requirements, and write into a file named requirements.txt.

use pip install -r requirements.txt to install all dependencies(usually not all, maybe make mistake by project owner)

Cache

只有pip --version大于23的时候才有cache这个命令(至少v20.0的时候没有)

时常会出现缓存内容过多的问题, 可以通过清理缓存的方式减少空间占用.

pip cache info # 展示缓存信息
pip cache remove [partten] # 删除单个文件
pip cache purge # 清理所有的缓存信息

import package from other position

import sys
 
sys.path.append("<parent/path/to/package>")

then, we can import the package from other location.

some packages are built-in with python, such as os, sys, math, etc.

some packages need to download(by pip), such as numpy, pandas, etc.

run a module

use python -m <path/to/module> to run a module directly.

args can simply append of the command: python -m <path/to/module> <args...>