How to Run Scripts After Installing a Python Package with Setuptools?

Post-Installation Script in Python Setuptools

In Python development, it is often necessary to perform additional tasks after a package installation. Setuptools, the primary tool for packaging and distributing Python projects, provides a mechanism to execute such post-installation scripts.

Objective:

The goal is to specify a Python script to be executed automatically upon the successful installation of a Python project using setuptools. This script can handle post-installation tasks such as displaying custom messages, or retrieving data from remote sources.

Solution:

To achieve this, one can utilize custom subcommands in setup.py. Here's an example that demonstrates how to implement separate post-install commands for development and installation modes:

from setuptools import setup
from setuptools.command.develop import develop
from setuptools.command.install import install

class PostDevelopCommand(develop):
    def run(self):
        develop.run(self)
        # Execute your post-install script or function here

class PostInstallCommand(install):
    def run(self):
        install.run(self)
        # Execute your post-install script or function here

setup(
    ...
    cmdclass={
        'develop': PostDevelopCommand,
        'install': PostInstallCommand,
    },
    ...
)

By utilizing the above approach, the defined post-install scripts will be automatically executed when the user runs the following commands:

• python setup.py install for project installation
• pip install for PyPI package installation

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