Decorator for the "f . g" style of function composition familiar to functional programmers.
Python, 25 lines
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Copy to clipboard1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | class CF(object):
'Decorator for creating a composable function'
def __init__(self, f):
self.func = f
def __call__(self, x):
return self.func(x)
def __getattr__(self, other):
other = globals()[other]
return CF(lambda x: self(other(x)))
#-------- Example ----------
@CF
def f(x):
return 3 * x
@CF
def g(x):
return x + 10
print (f . g)(2) # same as f(g(2))
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Tags: shortcuts
