详解Python当中的pip常用命令

py -m ensurepip --upgrade

pip install --upgrade pip

pip install -U pip

pip install package-name

pip install matplotlib==3.4.1

pip uninstall package_name

pip install --upgrade package_name# 或者是pip install -U package_name

pip show -f requests

Name: requests
Version: 2.24.0
Summary: Python Http for Humans.
Home-page: https://requests.readthedocs.io
Author: Kenneth Reitz
Author-email: me@kennethreitz.org
License: Apache 2.0
Location: c:userspc120PyCharmprojectspythonproject1venvlibsite-packages
Requires: certifi, chardet, idna, urllib3
Required-by: etelemetry, gTTS, pandas-datareader, pandas-profiling, pyler, pywhatkit, pyxnat, streamlit, tushare, wikipedia, yfinance
Files:
requests-2.24.0.dist-infoDESCRIPTION.rst
requests-2.24.0.dist-infoINSTALLER
.......

pip list -o

PackageVersion Latest Type
---------- ------- ------ -----
docutils 0.15.20.18.1 wheel
PyYAML 5.4.1 6.0wheel
rsa4.7.2 4.8wheel
setuptools 56.0.062.1.0 wheel

pip check package_name

pip check

yfinance 0.1.70 has requirement requests>=2.26, but you have requests 2.24.0.
selenium 4.1.0 has requirement urllib3[secure]~=1.26, but you have urllib3 1.25.11.

pip install -i https://pypi.douban.com/simple/ package_name

清华：https://pypi.tuna.tsinghua.edu.cn/simple
阿里云：http://mirrors.aliyun.com/pypi/simple/
中国科技大学 https://pypi.mirrors.ustc.edu.cn/simple/
华中理工大学：http://pypi.hustunique.com/
山东理工大学：http://pypi.sdutlinux.org/ 
豆瓣：http://pypi.douban.com/simple/

pip download package_name -d "某个路径"

pip download requests -d "."

pip freeze > requirements.txt

pip install -r requirements.txt