redefinition of unused function

[DeaD_EyE]

Hm! What does pythonic mean, then?

I do not know all built-in functions and modules. Perhaps there is a better way. As R. Hettinger says. I didn't read the previous posts very well. @Gribouillis mentioned it - from the functools module singledispatch.

def func(something):
    if isinstance(something, (int, float)):
        return something ** 2
    elif isinstance(something, bytes):
        return something.decode(errors='IGNORE')
    elif isinstance(something, (list, tuple, dict)):
        return list(something)
    else:
        raise Exception('Input type not supported')

I like the syntactic sugar of signledispatch.
Now the same function with singledispatch:

@singledispatch
def func(something):
    raise Exception('Input type not supported')

@func.register(float)
@func.register(int)
def _(something):
        return something ** 2

@func.register(bytes)
def _(something):
    return something.decode(errors='IGNORE')

@func.register(list)
@func.register(tuple)
@func.register(dict)
@func.register(set)
def _(something):
    return list(something)