MacroPy is an implementation of Macros in the Python Programming Language. MacroPy provides a mechanism for user-defined functions (macros) to perform transformations on the abstract syntax tree(AST) of Python code at module import time. This is an easy way to modify the semantics of a python program

Python like you’ve never seen before

MacroPy allows you to create constructs which are impossible to have in normal python code, such as:

Tracing

with trace:
    sum([x + 5 for x in range(3)])

# sum([x + 5 for x in range(3)])
# range(3) -> [0, 1, 2]
# x + 5 -> 5
# x + 5 -> 6
# x + 5 -> 7
# [x + 5 for x in range(3)] -> [5, 6, 7]
# sum([x + 5 for x in range(3)]) -> 18

Quick Lambdas

print map(f[_[0]], ['omg', 'wtf', 'bbq'])
# ['o', 'w', 'b']

print reduce(f[_ + _], ['omg', 'wtf', 'bbq'])
# 'omgwtfbbq

Case Classes

@case
class Point(x, y): pass

p = Point(1, 2)

print str(p)    #Point(1, 2)
print p.x       #1
print p.y       #2
print Point(1, 2) == Point(1, 2) # True

And more! All this runs perfectly on vanilla Python 2.7 or PyPy 2.0. For more details, see the GitHub page. or ask in the Google Group.

Metadata

Release files for MacroPy 1.0.3

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Source distribution (sdist)

Source distribution for MacroPy 1.0.3
File	Size	Uploaded	Provenance
MacroPy-1.0.3.zip	36.8 kB	Jul 9, 2013	Without provenance	Details

Release files / MacroPy-1.0.3.zip

Download URL	MacroPy-1.0.3.zip
Size	36.8 kB
Tags	Source
SHA-256 checksum How to use checksums	`e667550a9887db625fb1ee1fee8cdadb02bee2d748ade8620d7d082463f0117b`
BLAKE2b-256 checksum How to use checksums	`f27f84ace573b16d10e2d930ecfb90933e77b14fa2dc12064b3b68a5c0ff5579`
Upload date	Jul 9, 2013
Uploaded using Trusted Publishing? What is trusted publishing?	No

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