skip to navigation
skip to content

Not Logged In

MacroPy 1.0.3

Macros for Python: Quasiquotes, Case Classes, LINQ and more!

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.

 
File Type Py Version Uploaded on Size
MacroPy-1.0.3.zip (md5) Source 2013-07-09 35KB
  • Downloads (All Versions):
  • 50 downloads in the last day
  • 361 downloads in the last week
  • 1243 downloads in the last month