gistfile1.py

def set_tracer(func):
    from functools import wraps
    @wraps(func)
    def inner(*args, **kwargs):
        import ipdb; ipdb.set_trace()
        return func(*args, **kwargs)
    return inner


def decorate_methods(decorator):
    '''
    Decorates all methods of a class with `decorator`.

    Example usage::

        @decorate_methods(some_logging_decorator)
        class Whatever:
            ...
    '''
    import inspect
    def inner_class_decorator(cls):
        methods = [(name, member) for (name, member) in inspect.getmembers(cls) if inspect.ismethod(member)]
        for name, method in methods:
            setattr(cls, name, decorator(method))
        return cls
    return inner_class_decorator