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 produce the most relevant, rather than
complete, information: ...
Note: Because dir() is supplied primarily as a convenience for use at an
interactive prompt, it tries to supply an interesting set of names more
than it tries to supply a rigorously or consistently defined set of
names, and its detailed behavior may change across releases."
And here's an example:
>>> class C(object):
... pass
...
>>> hasattr(C, '__eq__')
True
>>> '__eq__' in dir(C)
False
--
Steven
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