Scientific computing using Cython

speaker: Simmi Mourya event: FOSSASIA 2017

Cython example def fib(int n):

• cdef int i, a, b
• a, b = 1, 1
• …

Cython compiles Python-like code to C code

• add types for speedups
• easily use native libraries
• writing a python wrapper for a C library

Building Cython code

• setup.py and distutils
• pyximport to import pyx files directly

cdef to create C function, must annotate all parameters cpdef to generate both C and Python function

cython -a to show C code generated by cython cimport to import C libraries like math

• from libc cimport math
• print(math.sin(math.M_PI / 2))