sufficiently pythonic code for testing type of function
bignose+hates-spam at benfinney.id.au
Wed Oct 11 07:44:05 CEST 2006
"Theerasak Photha" <hanumizzle at gmail.com> writes:
> I wrote this for someone else to take an object and list of types,
> then check if obj is one of those types, raising an error otherwise.
> Is it enough to rely on side effects or absence thereof, or should I
> put return True in here somewhere?
> def test_obj_type(obj, types):
> for type in types:
> if isinstance(obj, type):
> raise ValueError, 'object is not in %s' % types
Why have you re-implemented (a less-functional version of) 'isinstance'?
Help on built-in function isinstance in module __builtin__:
isinstance(object, class-or-type-or-tuple) -> bool
Return whether an object is an instance of a class or of a subclass thereof.
With a type as second argument, return whether that is the object's type.
The form using a tuple, isinstance(x, (A, B, ...)), is a shortcut for
isinstance(x, A) or isinstance(x, B) or ... (etc.).
>>> isinstance(3, (int, float))
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