Pythonic way of setting a default

Is there a simple way of of sett开发者_运维问答ing a default in python - specifically setting a default in a dict?

For instance, let's say I have a dict called foo, which may or may not have something assigned on the key bar. The verbose way of doing this is:

if not foo.has_key('bar'):
  foo['bar'] = 123

One alternative would be:

foo['bar'] = foo.get('bar',123)

Is there some standard python way of doing this - something like the following, but that actually works?

foo['bar'] ||= 123

Doesn't anyone read the documentation?

foo.setdefault('bar', 123)

You could check out defaultdict

(Wrong first part of the answer edited away)

Dicts have a setdefault() method that works just as get(), only it inserts the value if the key was missing.

foo.setdefault('bar', 123)

Cheers.