数据类型为字典时如何使用循环

my_dict = {"key1": "value1", "key2": "value2", "key3": "value3"}

for key in my_dict:
    print(key)

key1
key2
key3

my_dict = {"key1": "value1", "key2": "value2", "key3": "value3"}

for value in my_dict.values():
    print(value)

value1
value2
value3

my_dict = {"key1": "value1", "key2": "value2", "key3": "value3"}

for key, value in my_dict.items():
    print(key, value)

key1 value1
key2 value2
key3 value3