Python loop dictionary keys and values   

Python iterate over dictionary

Loop over keys and values (order it's not guaranteed):

dict = {1: 'Python', 2: 'Java', 3: 'Javascript', 0:'None'}

# print key and values
for key, value in dict.items():
    print('key: ', key, ' value: ', value)

result:

key:  0  value:  None
key:  1  value:  Python
key:  2  value:  Java
key:  3  value:  Javascriptt

Python loop over keys only

Loop over keys and values when the order doesn't matter:

dict = {1: 'Python', 2: 'Java', 3: 'Javascript'}
# print out all the keys
for key in dict:
    print(key)

result:

1
2
3

Python loop over values only

Loop over keys and values when the order doesn't matter:

dict = {1: 'Python', 2: 'Java', 3: 'Javascript', 0:'None'}

# print out all values
for value in dict.values():
    print(value)

result:

None
Python
Java
Javascript

Python other ways to loop

Dictionaries in python can be loop also with list(dict), dict.keys(), dict.values and dict.items:

dict = {1: 'Python', 2: 'Java', 3: 'Javascript', 0:'None'}
print(list(dict))
print(dict.keys())
print(dict.values())
print(dict.items())

result:

[0, 1, 2, 3]
dict_keys([0, 1, 2, 3])
dict_values(['None', 'Python', 'Java', 'Javascript'])
dict_items([(0, 'None'), (1, 'Python'), (2, 'Java'), (3, 'Javascript')])