how to make class and instance method (multiple decorator) ?

[harun2525]

I want make a method like in the following example

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class foo():         @classmethod    @instancemethod # problem:NameError: name 'instancemethod' is not defined    def method(cls, self):         print("method class =", cls)         print("method object =", self)   example = foo() example.method() #___output___ # method class = ....... # method object = .....

how can I make it in other way ?

Thanks

[micseydel]

That doesn't really make sense. You can't call it as a class method, since you won't know the instance. Calling it as an instance method, you can get cls with type(self). So why both?

Also, in Python we almost never use class methods. Why not just a regular function?

[micseydel]

If you really want this for some reason, you could do something like this

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class Foo():     def __init__(self):         self.method = self.__instance_method           @classmethod     def method(cls):         print("method class =", cls)       def __instance_method(self):         print("method object =", self)    Foo.method()   foo = Foo() foo.method()

Output:
method class = <class '__main__.Foo'>
method object = <__main__.Foo object at 0x7f76cb5409e8>

But again, making their behavior identical doesn't really make sense.

[harun2525]

@micseydel,

thanks.

[micseydel]

Could you elaborate on why you need this?

[harun2525]

@micseydel,

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import os, sys   import langauge.main   __filepath__ = os.path.realpath(__file__) __directory__ = os.path.dirname(__filepath__) __progdir__ = os.path.dirname(__directory__)     class main():     launched = False     def __init__(self):         pass       @classmethod     def run(cls, self):         if cls.launched:             pass         if __name__ == "__main__":     program = main()     program.run()       del program.run  # this code for prevent the running again program

[ichabod801]

You can achieve the same thing using the techniques shown above:

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class Main(object):       launched = False       def run(self):         if not self.launched:             print('Running...')             type(self).launched = True         else:             raise RuntimeError('Program has already been run.')

Output:
>>> x = Main()
>>> y = Main()
>>> x.run()
Running...
>>> y.run()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "forum_test.py", line 10, in run
    raise RuntimeError('Program has already been run.')
RuntimeError: Program has already been run.

[harun2525]

@ichabod801,

Thanks.