Consider the following code:
def apples():
print(apples.applecount)
apples.applecount += 1
apples.applecount = 0
apples()
>>> 0
apples()
>>> 1
# etc
Is this a good idea, bad idea or should I just destroy myself? If you're wondering why I would want this, I got a function repeating itself every 4 seconds, using win32com.client.Dispatch()
it uses the windows COM to connect to an application. I think it's unnecessary to recreate that link every 4 seconds. I could of course use a global variable, but I was wondering if this would be a valid method as well.
It would be more idiomatic to use an instance variable of a class to keep the count:
class Apples:
def __init__(self):
self._applecount = 0
def apples(self):
print(self._applecount)
self._applecount += 1
a = Apples()
a.apples() # prints 0
a.apples() # prints 1
If you need to reference just the function itself, without the a
reference, you can do this:
a = Apples()
apples = a.apples
apples() # prints 0
apples() # prints 1
It is basically a namespaced global. Your function apples()
is a global object, and attributes on that object are no less global.
It is only marginally better than a regular global variable; namespaces in general are a good idea, after all.
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