How do I check that multiple keys are in a dict in a single pass?

I want to do something like:

foo = {
    'foo': 1,
    'zip': 2,
    'zam': 3,
    'bar': 4
}

if ("foo", "bar") in foo:
    #do stuff

How do I check whether both foo and bar are in dict foo?

Well, you could do this:

>>> if all(k in foo for k in ("foo","bar")):
...     print "They're there!"
...
They're there!