Elementwise 0.120116 -//- beta release -//- Lazily compute functions,method calls and operations on

[Nathan Rice]

Elementwise provides helpful proxy objects which let you perform a
series of computations on every element of an iterable or graph, in a
lazy manner.

Docs: http://packages.python.org/elementwise/
GitHub: https://github.com/nathan-rice/Elementwise
Examples:

The standard ElementwiseProxy:

nums = ElementwiseProxy([1, 2, 3, 4)
print nums.bit_length() 1, 2, 2, 3
nums + 1 2, 3, 4, 5
print nums * 2 2, 4, 6, 8
print nums == 2 False, True, False, False
print ((nums + 1) * 2 + 3).apply(float) 7.0, 9.0, 11.0, 13.0
print (nums.apply(float) + 0.0001).apply(round, 2) 1.0, 2.0, 3.0, 4.0
print abs(nums - 3) 2, 1, 0, 1
print (nums * 2 + 3) / 4
print efoo2.undo(3) 1, 2, 3, 4
print ((nums * 2 + 3) / 4).replicate([2, 2, 3, 3]) 1, 1, 2, 2
words = ElementwiseProxy(["one", "two", "three", "four"])
print (words + " little indians").upper().split("

").apply(reversed).apply("_".join) * 2
'INDIANS_LITTLE_ONEINDIANS_LITTLE_ONE',
'INDIANS_LITTLE_TWOINDIANS_LITTLE_TWO',
'INDIANS_LITTLE_THREEINDIANS_LITTLE_THREE',
'INDIANS_LITTLE_FOURINDIANS_LITTLE_FOUR'

The PairwiseProxy:

nums = PairwiseProxy([1, 2, 3, 4])
nums + [1, 2, 3, 4] 2, 4, 6, 8
nums * [2, 2, 3, 3] 2, 4, 9, 12
nums == [2, 2, 3, 5] False, True, True, False
(nums.apply(float) / itertools.count(2) +

itertools.count(1)).apply(round, args=itertools.repeat([2]))
1.5, 2.67, 3.75, 4.8

abs(nums - [3, 2, 1, 1]) 2, 0, 2, 3
(nums * [2, 2, 1, 5] + [3, 5, 9, 0]) / [4, 1, 2, 3] 1, 9, 6, 6
((nums * itertools.repeat(2) + itertools.repeat(3)) /

itertools.repeat(4)).replicate([2, 2, 3, 3])
1, 0, 0, 0

((nums * [2, 3, 4, 5]) > [5, 6, 7, 8]) != [True, True, False, True]

True, True, True, False

The RecursiveElementwiseProxy:

treenums = RecursiveElementwiseProxy([[1, 2, 3], [4, 5, 6], [7, 8, 9]])
treenums + 1 ((2, 3, 4), (5, 6, 7), (8, 9, 10))
treenums * 2 ((2, 4, 6), (8, 10, 12), (14, 16, 18))
(treenums * 2 + 1).apply(float)

((3.0, 5.0, 7.0), (9.0, 11.0, 13.0), (15.0, 17.0, 19.0))


Feedback is welcome.