Description:

patterns 0.3

Pattern matching for python. Works in Python 2.7, 3.3+ and pypy.

Installation
pip install patterns


Usage
from patterns import patterns, Mismatch

@patterns
def factorial():
if 0: 1
if n is int: n * factorial(n-1)
if []: []
if [x] + xs: [factorial(x)] + factorial(xs)
if {'n': n, 'f': f}: f(factorial(n))

assert factorial(0) == 1
assert factorial(5) == 120
assert factorial([3,4,2]) == [6, 24, 2]
assert factorial({'n': [5, 1], 'f': sum}) == 121

factorial('hello') # raises Mismatch
See tests for more examples.


TODO

docs
aliases for structures
destructure objects
name parameter
better handling of Mismatch passing to function env
non-strict dict matching

License

For personal and professional use. You cannot resell or redistribute these repositories in their original state.

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