python pkg_resources模块实例详解

import pkg_resources
pkg_resources.require('torch')
[torch 1.7.0+cu92 (/usr/local/lib/python3.6/dist-packages),
 numpy 1.19.4 (/usr/local/lib/python3.6/dist-packages),
 typing-extensions 3.6.6 (/usr/local/lib/python3.6/dist-packages),
 future 0.17.1 (/usr/local/lib/python3.6/dist-packages),
 dataclasses 0.8 (/usr/local/lib/python3.6/dist-packages)]

from pathlib import Path
import pkg_resources #此为管理安装包信息相关模块
file='/userhome/yolov5-t/requirements.txt'
for x in pkg_resources.parse_requirements(Path(file).open()):
    print(x.name)
    print(x.specifier)
Cython
matplotlib
>=3.2.2
numpy
>=1.18.5
opencv-python
>=4.1.2
Pillow
......

def check_requirements(file='requirements.txt', exclude=()):
    # Check installed dependencies meet requirements
    import pkg_resources #此为管理安装包信息相关模块
    requirements = [f'{x.name}{x.specifier}' for x in pkg_resources.parse_requirements(Path(file).open())
                    if x.name not in exclude]
    pkg_resources.require(requirements)  #判断已经安装的包是否符合要求

import pkg_resources
file_path = pkg_resources.resource_filename("my_package", "test.txt")
print(file_path)