Eryk Sun added the comment:
The register() method should raise a TypeError if it's called with an object
that's not a type.
Consider the following:
from functools import singledispatch
class C:
pass
obj = C()
@singledispatch
def foo(x):
print(foo.dispatch(x))
print("foo")
@foo.register(obj)
def bar(x):
print(foo.dispatch(x))
print("bar")
>>> foo(obj)
<function bar at 0x7f16f2adc9d8>
foo
----------
nosy: +eryksun
title: singledispatch is wonky with enums -> singledispatch register should
typecheck its argument
versions: +Python 3.6
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Python tracker <[email protected]>
<http://bugs.python.org/issue27984>
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