Re: Is there a function that applies list of functions to a value?

[Terry Reedy]

On 8/29/2013 5:48 PM, fp2...@gmail.com wrote:

Here is the generalisable version:

def comp(*func):
     def anon(x):
         res=x
         for f in func:
             res=f(res)
         return res
     return anon

With a bit more work, one can set the __name__ and __qualname__ attributes.

import math as m

def comp(*func, name=''):
    def anon(x):
        res=x
        for f in func:
            res=f(res)
        return res
    if name:
        anon.__name__ = name
        q = anon.__qualname__.rsplit('.', maxsplit=1)
        q[1] = name
        anon.__qualname__ = '.'.join(q)
    return anon

esincos = comp(m.exp, m.sin, m.cos, name='esincos')
print(esincos)
#
<function comp.<locals>.esincos at 0x00000000033107B8>

--
Terry Jan Reedy

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