Why 'open' is not a function according to inspect module?

[James Mills]

On Wed, Jun 23, 2010 at 1:42 AM, Peng Yu <pengyu.ut at gmail.com> wrote:
> 'open' is not a function according to inspect module. But according to
> help(open), it is a function. Is there something wrong with inspect
> module?

$ python
Python 2.6.5 (r265:79063, Jun 13 2010, 14:03:16)
[GCC 4.4.4 (CRUX)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from inspect import isbuiltin, isclass, isfunction
>>> type(str)
<type 'type'>
>>> isbuiltin(str), isclass(str), isfunction(str)
(False, True, False)
>>> def foo(): pass
...
>>> type(foo)
<type 'function'>
>>> isbuiltin(foo), isclass(foo), isfunction(foo)
(False, False, True)
>>> type(open)
<type 'builtin_function_or_method'>
>>> isbuiltin(open), isclass(open), isfunction(open)
(True, False, False)
>>>

Notice anything ?

--James

PS: The Python REPL is your friend :)

-- 
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-- "Problems are solved by method"