On 06/16/2015 05:15 AM, Steven D'Aprano wrote:
On Tuesday 16 June 2015 10:24, Ron Adam wrote:
>Another way is to make it an object with a __call__ method.
>
>The the attribute can be accessed from both outside and inside dependably.
That's what functions are, objects with a __call__ method:
py> (lambda: None).__call__
<method-wrapper '__call__' of function object at 0xb7301a04>
Yes ;-)
One slight disadvantage is that functions don't take a "self" parameter by
default, which means they have to refer to themselves by name:
def spam():
print spam.attr
Here's a fun hack:
py> from types import MethodType
py> def physician(func):
... # As in, "Physician, Know Thyself":-)
... return MethodType(func, func)
...
py> @physician
... def spam(this, n):
... return this.food * n
...
py> spam.__func__.food = "spam-and-eggs "
py> spam(3)
'spam-and-eggs spam-and-eggs spam-and-eggs'
How about this?: (paste it into your console)
#---------------------
import sys
class EDir:
long = False
def __call__(self, obj=None):
if obj == None:
d = sys._getframe(1).f_locals
else:
d = dir(obj)
return [x for x in d if self.long or not x.startswith("_")]
edir = EDir()
edir()
edir(edir)
edir.long = True
edir(edir)
edir.long = False
edir(edir)
#----------------------
I didn't test how that works from other modules or in nested scopes. Also
replacing None with a unique sentinel object may be better so dir(None)
will work.
Cheers,
Ron
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