Python Load_entry_point Console_scripts

When pip (or another console_scripts aware installer) installs the distribution, it will create a command-line wrapper for each entry point. Applications can use entry points to load plugins; e.g. Pygments (a syntax highlighting tool) can use additional lexers and styles from separately installed packages.

The docs for the (awesome) Click package suggest a few reasons to use entry points instead of scripts, including cross-platform compatibility and avoiding having the interpreter assign __name__ to __main__, which could cause code to be imported twice (if another module imports your script) Click is a nice way to implement functions for use as entry_points, btw. Entry Points ¶ Entry points are a type of metadata that can be exposed by packages on installation. They are a very useful feature of the Python ecosystem, and come specially handy in two scenarios: 1.

The package would like to provide commands to be run at the terminal. This functionality is known as console scripts. The entry_points/console_scripts option is a feature provided by the setuptools package, which is commonly used for packaging and distributing Python projects.

It allows you to define command. Uses the pkg_resources module to discover all the entry points by scanning the Python path. The entry points for the hangman package are scanned and the hangman key from the console_scripts group is found and then called (again, calling hangman.main().

The combination of console_scripts and entry_points in a project's setup.py can help us achieve the same results as the previous sections, but without the need for the if __name__ == '__main__' pattern. console_scripts, they say, is a special type of entry point. setuptools reads its content as " = " and creates an appropriate script when your package is installed.

Creates an executable (a non-test binary) for console_script entry points. This rule is to make it easier to generate console_script entry points as per Python specification. Generate a py_binary target for a particular console_script entry_point from a PyPI package, e.g.

for creating an executable pylint target use. There are multiple ways to write an app in Python. However, not all of them provide your users with the best experience.

One of the problems some people encounter is writing launch scripts. The best way to handle this is the Entry Points mechanism of Setuptools, and a __main__.py file. It's quite easy to implement.

If you're interested, read on to! I assume that a script that is created in /usr/bin or a similar directory (called scripts in the sysconfig installation scheme) from a console_script entry point would never need to import Python modules from /usr/bin itself.

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