Python Interop Recipes

This page collects small MakrellPy interop patterns. The goal is to show how MakrellPy and Python can call into each other without losing the structural style of Makrell code.

Recipe: import a Python module

{import math}
{math.sqrt 4}

This is the simplest interop shape: import a Python module at runtime and call its functions through ordinary Makrell syntax.

Recipe: import selected names

{import math@[sin cos]}
{sin 0} + {cos 0}

This is useful when you want shorter local names instead of carrying the module prefix through a whole file.

Recipe: call MakrellPy from Python

MakrellPy is designed for two-way interop with Python modules.

MakrellPy module:

{import pycalc@[mul]}

{fun add [x y]
    x + y}

Python module:

import makrell
from mrcalc import add, mul

result = add(2, mul(3, 5))
print(result)

This is useful when Makrell code is one part of a larger Python application rather than a completely separate environment.

When to use these patterns

These recipes are most useful when you want:

  • access to ordinary Python libraries

  • MakrellPy code inside a Python-oriented project

  • a gradual boundary between Makrell and Python instead of a hard separation