32.Dictionaries-2

#fromkeys() method creates a dictionary from the given sequence of keys and values.

d = {
    'c', 'b'
}

i = 3

d1 = dict.fromkeys(d, i)    #new_dictionary_name = dict.fromkeys(iterable, value)
print(d1)
#Output: {'c': 3, 'b': 3}

g = [2, 5, 6]

d2 = dict.fromkeys(d, g)
print(d2)
#Output: {'c': [2, 5, 6], 'b': [2, 5, 6]}

d2.setdefault('b', [2, 5, 4])   #the value of key "b" won't change since it has already existing value
d2.setdefault('a', [2, 5, 7])   #key doesn't exists so key will be inserted with specified value
print(d2)
#Output: {'b': [2, 5, 6], 'c': [2, 5, 6], 'a': [2, 5, 7]}