Python Fire

Python Fire is a library for automatically generating command line interfaces (CLIs) from absolutely any Python object.

  • Python Fire is a simple way to create a CLI in Python.
  • Python Fire is a helpful tool for developing and debugging Python code.
  • Python Fire helps with exploring existing code or turning other people's code into a CLI.
  • Python Fire makes transitioning between Bash and Python easier.
  • Python Fire makes using a Python REPL easier by setting up the REPL with the modules and variables you'll need already imported and created.


To install Python Fire with pip, run: pip install fire

To install Python Fire with conda, run: conda install fire -c conda-forge

To install Python Fire from source, first clone the repository and then run:
python install

Basic Usage

You can call Fire on any Python object:

functions, classes, modules, objects, dictionaries, lists, tuples, etc.
They all work!

Here's an example of calling Fire on a class.

import fire

class Calculator(object):
  """A simple calculator class."""

  def double(self, number):
    return 2 * number

if __name__ == '__main__':

Then, from the command line, you can run:

python double 10  # 20
python double --number=15  # 30