* Steven D'Aprano [110316 05:26]:
> Tim Johnson wrote:
> > What is the difference between using
> > hasattr(object, name)
> > and
> > name in dir(object)
> > ?
>
> Did you read the Fine Manual?
No but I will :)
> http://docs.python.org/library/functions.html#dir
>
> "The default dir() mechanis
Tom Zych wrote:
I suppose there must be some reliable way to get a list of *all* an
object's attributes, but I don't see it.
Nope, there isn't, because Python allows classes to define arbitrary
attributes at runtime.
>>> import random
>>> class Funny:
... def __getattr__(self, name):
.
On Thu, 17 Mar 2011 00:12 +1100, "Steven D'Aprano"
wrote:
> And here's an example:
>
> >>> class C(object):
> ... pass
> ...
> >>> hasattr(C, '__eq__')
> True
> >>> '__eq__' in dir(C)
> False
OTOH, I got True in 3.1.1. As the docs say, detailed behavior may change
across releases.
I supp
Wayne Werner wrote:
However, rare is the occasion that you should use either of these. If you're
doing something like:
if hasattr(myobj, 'something'):
myobj.something()
else:
print "blah blah blah"
then what you really should be doing is:
try:
myobj.something()
except AttributeErro
Tim Johnson wrote:
What is the difference between using
hasattr(object, name)
and
name in dir(object)
?
Did you read the Fine Manual?
http://docs.python.org/library/functions.html#dir
"The default dir() mechanism behaves differently with different types of
objects, as it attempts to pro
This following post was originally posted to the wrong thread.
I am reposting (hopefully correctly) with the first and very
succint response. I thing the answer is a revealation to
be noted:
##
On Tue, Mar 15, 2011 at 8:00 PM, Tim Johnson wr
* Wayne Werner [110315 17:29]:
> On Tue, Mar 15, 2011 at 8:00 PM, Tim Johnson wrote:
>
> > What is the difference between using
> > hasattr(object, name)
> > and
> > name in dir(object)
> >
>
> hasattr is basically
>
> try:
> object.name
> return True
> except AttributeError:
>
On Tue, Mar 15, 2011 at 8:00 PM, Tim Johnson wrote:
> What is the difference between using
> hasattr(object, name)
> and
> name in dir(object)
>
hasattr is basically
try:
object.name
return True
except AttributeError:
return False
while "name in dir(object)" is (AFAIK) more lik
What is the difference between using
hasattr(object, name)
and
name in dir(object)
?
TIA
--
Tim
tim at johnsons-web dot com or akwebsoft dot com
http://www.akwebsoft.com
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