Using a Wrapper on a class method in Python

Question

I'd like to be able to use a wrapper on a class method:

def wrapper(f):
def inner(*args,**kwargs):
    print 'inner '+f.__name__
    x = f(*args,**kwargs)
    return x
return inner

class A:
    @wrapper
    def f1(x=55):
       return x

print A().f1()

This returns <main.A instance at 0x05FF7530>

How can I return the result of the wrapped function A.f1()?

please fix the indentation

Pavel
– Pavel

2014-06-08 15:09:19 +00:00
Commented Jun 8, 2014 at 15:09 — Pavel
– Pavel, Commented Jun 8, 2014 at 15:09

Daniel · Accepted Answer · 2014-06-08 15:05:50Z

2

You have forgotten the self-argument:

class A:
    @wrapper
    def f1(self, x=55):
       return x

answered Jun 8, 2014 at 15:05

Daniel

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Comments

wwii · Accepted Answer · 2014-06-08 15:35:44Z

0

If you truly want to call it as stated in the question, make it a classmethod:

class A:
    @classmethod
    @wrapper
    def f1(self, x=55):
       return x
>>> A.f1()
inner f1
55
>>>

answered Jun 8, 2014 at 15:35

wwii

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