[Python decorate use class method] tags:Python, decorate

python_decorate_use_method.py

def catch_exception(origin_func):
    def wrapper(self=None, *args, **kwargs):
        print('start')
        try:
            u = origin_func(self, *args, **kwargs)
            return u
        except Exception:
            self.z()
            return 'an Exception raised.'
    return wrapper


class X(object):
    def __init__(self):
        pass

    @catch_exception
    def y(self, a, b):
        print('the parameter are: {}, {}'.format(a, b))
        return 'I am Y, a method of X.'

    def z(self):
        print('I am Z, a method of X, I am here because Y died.')

v = X()
print(v.y(1)) #here will return False because the number of parameter is not enougth
print(v.y(1, 2))