Hello all. Some time ago I wrote a little library:
http://github.com/si14/python-functional-composition/ , inspired by
modern functional languages like F#. In my opinion it is quite useful
now, but I would like to discuss it.
An example of usage:
import os
from pyfuncomp import composable, c, _
def comment_cutter(s):
t = s.find("#")
return s if t < 0 else s[0:t].strip()
@composable #one can use a decorator to make a composable function
def empty_tester(x):
return len(x) > 0 and x[0] != "#"
path_prefix = "test"
config_parser = (c(open) >> #or use a transformer function
c(str.strip).map >> #"map" acts like a function modifier
c(comment_cutter).map >>
empty_tester.filter >> #so does "filter"
c(os.path.join)[path_prefix, _].map) #f[a, _, b] is
used to make a partial.
#f[a, foo:bar,
baz:_] is also correct
print config_parser("test.txt")
print (c("[x ** %s for x in %s]")[2, _] << c(lambda x: x * 2).map)([1, 2, 3])
Any suggestions are appreciated.
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