LC

Write a CPython C Extension Module from Scratch

hard5/8

Disassemble Python Bytecode and Match to CPython Source Understand CPython's Memory Allocator: obmalloc

Language

Compiler

2.0s Limit 256MB

Implementation

Write a C program showing a C extension module structure.

Requirements:

Show PyMethodDef array with at least one method definition
Show PyModuleDef structure with module metadata
Show PyInit_ function that creates the module
Implement a simple math function (e.g., fast_add or fast_power) in C
Use PyArg_ParseTuple for argument parsing
Return appropriate PyObject from the C function
Print the conceptual structure and explain each part
Show error handling with PyErr_SetString

Why This Matters

The PyMethodDef/PyModuleDef/PyInit_ scaffolding you're writing here is the exact structure NumPy's C core and Cython-generated modules compile down to — it's the real ABI every performance-critical Python library uses to drop into C. Getting PyArg_ParseTuple format codes and reference-counted return values right is what separates a working extension from one that segfaults or leaks.

Hints

0 / 3 revealed

Validation Suite

main.c

Workspace 1.0