I stumbled across this (while using my homebrewn enum class):
class test:
pass
instance = test()
setattr(instance, "THIS :*2+~# IS OBVIOUSLY INVALID", 123)
I would've expected some kind of error message here when calling
setattr(); after all, its not a regular attribute? Plus, documentation
says
"
Set a named attribute on an object; setattr(x, 'y', v) is equivalent
to
``x.y = v''.
"
and you cannot write this:
instance.THIS :*2+~# IS OBVIOUSLY INVALID = 123
(oh, and its: PythonWin 2.3.3 (#51, Dec 18 2003, 20:22:39) [MSC v.1200
32 bit (Intel)] on win32.) 4 1995
Gerson Kurz wrote: I stumbled across this (while using my homebrewn enum class):
class test: pass
instance = test() setattr(instance, "THIS :*2+~# IS OBVIOUSLY INVALID", 123)
I would've expected some kind of error message here when calling setattr(); after all, its not a regular attribute?
Okay. But so what?
-Peter
Peter Hansen wrote: Gerson Kurz wrote:
I stumbled across this (while using my homebrewn enum class):
class test: pass
instance = test() setattr(instance, "THIS :*2+~# IS OBVIOUSLY INVALID", 123)
I would've expected some kind of error message here when calling setattr(); after all, its not a regular attribute?
Okay. But so what?
-Peter
And sometime it is usefull to create some attributes that can unlikely
be used by the programmer (for example for cache or...).
I've seen code on coockbook that were using that property.
--
Yermat ge*********@t-online.de (Gerson Kurz) wrote in message news:<40**************@news.t-online.de>... I stumbled across this (while using my homebrewn enum class):
class test: pass
instance = test() setattr(instance, "THIS :*2+~# IS OBVIOUSLY INVALID", 123)
I would've expected some kind of error message here when calling setattr(); after all, its not a regular attribute? Plus, documentation says
" Set a named attribute on an object; setattr(x, 'y', v) is equivalent to ``x.y = v''. "
and you cannot write this:
instance.THIS :*2+~# IS OBVIOUSLY INVALID = 123
No, but you can write this: a = getattr(instance, "THIS :*2+~# IS OBVIOUSLY INVALID") print a
123
Meno.
You can also do this:
class test:
pass
instance = test()
setattr(instance, "THIS :*2+~# IS OBVIOUSLY INVALID", 123) print instance.__dict__["THIS :*2+~# IS OBVIOUSLY INVALID"] 123
print instance.__dict__.keys() ['THIS :*2+~# IS OBVIOUSLY INVALID']
print instance.__dict__.items() [('THIS :*2+~# IS OBVIOUSLY INVALID', 123)]
The only reason that you cannot do:
instance.This :*2+~# IS OBVIOUSLY INVALID
is because attribute names accessed in this
fashion can't have spaces.
Larry Bates,
Syscon, Inc.
"Meno" <do*******@doityourself.com> wrote in message
news:9c*************************@posting.google.co m... ge*********@t-online.de (Gerson Kurz) wrote in message
news:<40**************@news.t-online.de>... I stumbled across this (while using my homebrewn enum class):
class test: pass
instance = test() setattr(instance, "THIS :*2+~# IS OBVIOUSLY INVALID", 123)
I would've expected some kind of error message here when calling setattr(); after all, its not a regular attribute? Plus, documentation says
" Set a named attribute on an object; setattr(x, 'y', v) is equivalent to ``x.y = v''. "
and you cannot write this:
instance.THIS :*2+~# IS OBVIOUSLY INVALID = 123
No, but you can write this: a = getattr(instance, "THIS :*2+~# IS OBVIOUSLY INVALID") print a
123
Meno. This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
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