Catch exceptions inside a class

Question

Is it possible to write an exception handler to catch the run-time errors generated by ALL the methods in class? I can do it by surrounding each one with try/except:

class MyError(Exception):
    def __init__(self, obj, method):
        print 'Debug info:', repr(obj.data), method.__name__
        raise

class MyClass:
    def __init__(self, data):
        self.data = data

    def f1(self):
        try:
            all method code here, maybe failing at run time
        except:
            raise MyError(self, self.f1)

I wonder if is there a more general way to achieve the same - for any error raising anywhere in the class. I would like to be able to access the class data to print some debug info. Also, how do I get the failing method name (f1 in the example)?

Update: thanks to all for the insighful answers, the decorator idea looks like the way to go. About the risk of trapping ALL the exceptions: a raise statement in the except branch should re-raise the exception without losing any information, doesn't it? That's why I put it in MyError also...

Answer 1

Warning: if you want something like this, it's likely you don't... but if you really want to...

Something like:

import functools

def catch_exception(f):
    @functools.wraps(f)
    def func(*args, **kwargs):
        try:
            return f(*args, **kwargs)
        except Exception as e:
            print 'Caught an exception in', f.__name__
    return func

class Test(object):
    def __init__(self, val):
        self.val = val

    @catch_exception
    def calc():
        return self.val / 0

t = Test(3)
t.calc()

shows how to decorate individual functions. You can then create a class decorator to apply this decorator to each method (be careful of classmethod's/staticmethod's/properties etc...)