from itertools import zip_longest
l1=[1,2,3,4,5,6,7]
l2=['a','b','c','d']
d1=zip_longest(l1,l2,fillvalue='x')
print (d1)#Output:<itertools.zip_longest object at 0x00993C08>
#Converting zip object to dict using dict() contructor.
print (dict(d1))
#Output:{1: 'a', 2: 'b', 3: 'c', 4: 'd', 5: 'x', 6: 'x', 7: 'x'}