python怎么遍历字典

>>> d = {'Python':'astonishing', 'C++':'complicated', 'Java':'versatile'}

>>> for key in d:

...     print(key + ':' + d[key])

...

Python:astonishing

C++:complicated

Java:versatile

>>> for value in d:

...     print(value)

...

Python

C++

Java

>>> for kv in d.items():

...     print(kv)

...

('Python', 'astonishing')

('C++', 'complicated')

('Java', 'versatile')

>>> for k, v in d.items():#开始偷懒，缩写k, v

...     print(k + ':' + v)

...

Python:astonishing

C++:complicated

Java:versatile

>>> for k, v in zip(d.keys(), d.values()):

...     print(k + ':' + v)

...

Python:astonishing

C++:complicated

Java:versatile