@typedispatch
def add(x:int, y:int):
return x+y
@typedispatch
def add(x:int, y:str):
return x + int(y)
… produces the following:
print(add(1,2)) #=> 3
print(add(1,'2')) #=> 3
BUT, if I pass these in using named arguments the type dispatch mechanism fails:
print(add(x=1,y=2))
---------------------------------------------------------------------------
IndexError Traceback (most recent call last)
<ipython-input-54-5d350863b395> in <module>
----> 1 add(x=1,y=2)
~/development/projects/blurr/_libs/fastcore/fastcore/dispatch.py in __call__(self, *args, **kwargs)
94 ts = L(args).map(type)[:2]
95 f = self[tuple(ts)]
---> 96 if not f: return args[0]
97 if self.inst is not None: f = MethodType(f, self.inst)
98 return f(*args, **kwargs)
IndexError: tuple index out of range
Maybe this is documented somewhere but it took me a few hours or wrestling with this before I figured it out, and so … here it is to ease other’s pain and/or see if this is a bug or python feature 