Check multiple key exists in dictionary

key_in_dict

>>> dic = { 1 : 'a', 2: 'b' }
>>> set(dic)
set([1, 2])

# Check if any key exists:

>>> set([1,2]) <= set(dic)
True
>>> set([1]) <= set(dic)
True
>>> set([3,4]) <= set(dic)
False

# Check all the key in the list exists in the dictionary:

>>> set([3,4]) == set(dic)
False
>>> set([1,2]) == set(dic)
True
>>> set([1,2]) == set(dic)
True
>>>