On Feb 14, 10:26 am, Robin Becker <[EMAIL PROTECTED]> wrote:
> I'm in the process of porting some code. I have 2.x code that looks like this
>
> t = type(e)
> if t==InstanceType:
> return f0(e)
> elif t in (float,int):
> return f1(e)
> else:
> return str(e)
>
> In python 3.0 everything has been unified and people say use attributes to
> tell
> what should be done in such a branch. However, this is the real world and this
> code is fairly complex. Originally we had a distinction between user defined
> class instances and those of the builtins like float, int, str etc etc. Is
> there
> any way for me to tell if an object is an instance of a used defined class
> which
> can then be tested further perhaps?
Here's something that'll work kind of sometimes.
def is_probably_user_defined_class(cls):
try:
modname = cls.__module__
except AttributeError:
return False
try:
mod = sys.modules[modname]
except KeyError:
return False
try:
filename = mod.__file__
except AttributeError:
return False
return filename.endswith('.pyc')
Carl Banks
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