Pythonic shorthand for keys in a dictionary?

Question

Simple question: Is there a shorthand for checking the existence of several keys in a dictionary?

'foo' in dct and 'bar' in dct and 'baz' in dct

Answer 1

all(x in dct for x in ('foo','bar','baz'))

Answer 2

You can use all() with a generator expression:

>>> all(x in dct for x in ('foo', 'bar', 'qux'))
False
>>> all(x in dct for x in ('foo', 'bar', 'baz'))
True
>>> 

It saves you a whopping 2 characters (but will save you a lot more if you have a longer list to check).