fakebinop.py

"""
Support `fake` binary operator
so we can do 
  a @f@ b
in addition to (and with the same meaning as):
  f(a, b)
"""

import collections.abc

class PartialBinop(object):
    def __init__(self, callable, left_arg):
        self.callable = callable
        self.left_arg = left_arg

    def __matmul__(self, right_arg):
        return self.callable(self.left_arg, right_arg)

class BinopCallable(collections.abc.Callable):
    def __init__(self, callable):
        self.callable = callable

    def __call__(self, *args, **kws):
        return self.callable(*args, **kws)

    def __rmatmul__(self, left_arg):
        return PartialBinop(self.callable, left_arg)

#### Example

@BinopCallable
def add(x, y):
    return x +  y

print(3 @add@ 5)