Nested try statements in python?

Question

Is there a nicer way of doing the following:

try:
    a.method1()
except AttributeError:
    try:
        a.method2()
    except AttributeError:
        try:         


        

Answer 1

Perhaps you could try something like this:

def call_attrs(obj, attrs_list, *args):
    for attr in attrs_list:
        if hasattr(obj, attr):
            bound_method = getattr(obj, attr)
            return bound_method(*args)

    raise AttributeError

You would call it like this:

call_attrs(a, ['method1', 'method2', 'method3'])

This will try to call the methods in the order they are in in the list. If you wanted to pass any arguments, you could just pass them along after the list like so:

call_attrs(a, ['method1', 'method2', 'method3'], arg1, arg2)