Hi,
i am new to python and i have a question about how decorators are
working.
I have understand HOW they do their magic but i am trying to figure out
WHEN they do it...
I have the following simple example:
#-----------------------------------------
def author(author_name):
def decorator(func):
func.author_name = author_name
return func
return decorator
@author("some author")
def F():
pass
# print F.author_name
#-----------------------------------------
I am using Eclipse/PyDev and when i run this snippet from the PyDev
debugger,
i see that even though i do not call F() (or reference F.author_name),
the decorator and all this stuff is executed and updates F.autor_name
variable.
How is this thing really working ??
I mean, if we run this .py file (pythn test.py) from the command
prompt,
what the runtime will do, even if we do not have ane commands to
execute, only functions
as above ?
It will load all the module, all the functions and when it sees that
some function(s) are decorating, then it will start execute respectives
decorators ?
And this will do it for all decorated functions ?? Even if we do not
have any references to these functions ?
Shouldn't this code called when we actually DO call it ?
Thanks a lot for any enlightment on this,
objectref
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