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Functional style dictionary and list classes + decorators for pattern matching function dispatch

Project description

Overview
========

Functional style 'list' and 'dict' classes & decorators for pattern matching function dispatch.

For more information, visit http://www.systemical.com/doc/opensource/pyfnc


Examples
========

Dictionary class 'dic' with 'return self' functionality:

>>> d=dic({"k2":"v2"})
>>> dr=d.update({"k1":"v1"})
>>> self.assertEqual(d, dr)

List class 'liste' with 'return self' functionality and integrated 'map', 'reduce' and 'filter' functions:

>>> l=liste()
>>> lr=l.extend([1,2,3])
>>> self.assertEqual(len(l), 3)
>>> self.assertEqual(l, lr)

>>> f=lambda x:x+10

>>> lm=l.map(f)
>>> self.assertEqual(lm, [11, 12, 13])
>>> self.assertEqual(l, [11, 12, 13])


Erlang style function dispatch:

>>> @pattern('male', str)
... def greet_male(p1, p2):
... return "Hello M. %s!" % p2

>>> @pattern('female', str)
... def greet_female(p1, p2):
... return "Hello Mrs. %s!" % p2

>>> @patterned
... def greet(p1, p2):
... pass

>>> print greet("male", "Dupont")
"Hello M. Dupont!"

>>> print greet("female", "Corriveau")
"Hello Mrs. Corriveau!"


Clean looking reducers:


@pattern(False, any)
def comp_reducer_FA(p1, p2):
return False

@pattern(str, str)
def comp_reducer_SS(p1, p2):
if p1==p2:
return p1
return False

@patterned
def comp_reducer(p1, p2):
'''
Reducer

Check if all strings are equal
'''


def strings_comparator(l):
'''
Returns the common string if all elements of 'l' are equal
else returns False
'''
if len(l)<2:
return False

return reduce(comp_reducer, l)


Tests
=====

Tests can be performed using `nosetests` in the root directory.

Project details


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