my_dict = {'name':'Jack', 'age': 26}
my_dict['address'] = 'Downtown'
# Output: {'address': 'Downtown', 'name': 'Jack', 'age':26}
print(my_dict)
And if you want to add multiple keys refer to the following example
x={1:2}
print(x)
d={3:4,5:6,7:8}
x.update(d)
print(x)
#output will be {1:2,3:4,5:6,7:8}