问如何查看pip(Python的包安装程序)源代码？

EN

example_project/
├── exampleproject/      Python package with source code.
|    ├── __init__.py     Make the folder a package.
|    └── example.py      Example module.
└── README.md            README with info of the project.
Within this structure, user can add setup.py to the root of the project (i.e. example_project for above structure) with the following content:

from setuptools import setup, find_packages

setup(
    name='example',  # Name of the package. This will be used, when the project is imported as a package.
    version='0.1.0',
    packages=find_packages(include=['exampleproject', 'exampleproject.*'])  # Pip will automatically install the dependences provided here.
)