default values of function parameters
Terry Reedy
tjreedy at udel.edu
Mon Jun 6 00:22:12 EDT 2005
"David Isaac" <aisaac0 at verizon.net> wrote in message
news:piPoe.8518$ld3.1868 at trnddc04...
> But the default values of function parameters seem rather like a static
> attributes of a class.
> Is that a good way to think of them?
If you think of a function as defining a subclass of execution instances,
with __init__ inherited from the superclass, then that is a possible way to
think of them. Goodness depends on your meaning of goodness ;-). Does it
help you write and use Python functions acurately?
> If so, are they somehow accessible?
> How? Under what name?
This is implementation specific. For CPython, the interactive interpreter
is your friend. Learn to use it!
>>> def f(): pass
...
>>> dir(f)
['__call__', '__class__', '__delattr__', '__dict__', '__doc__', '__get__',
'__ge
tattribute__', '__hash__', '__init__', '__name__', '__new__', '__reduce__',
'__r
epr__', '__setattr__', '__str__', 'func_closure', 'func_code',
'func_defaults',
'func_dict', 'func_doc', 'func_globals', 'func_name']
Now give f some parameters with defaults and print f.func_defaults.
Terry J. Reedy
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