输出结果

• 输出： dict_keys(['a', 'b', 'c'])

dict1 = {'a': 1, 'b': 2, 'c': 3}
keys = dict1.keys()
print(keys)

判断dict_keys对象是否包含某个元素

dict1 = {'a': 1, 'b': 2, 'c': 3}
keys = dict1.keys()
if "a" in keys:
    print("dict_keys中包含a")

遍历dict_keys

dict1 = {'a': 1, 'b': 2, 'c': 3}
keys = dict1.keys()
for key in keys:
    print(key)

将dict_keys对象转化为列表

dict1 = {'a': 1, 'b': 2, 'c': 3}
keys = dict1.keys()
key_list = list(keys)
print(key_list)

求并、交、差集

dict1 = {'a': 1, 'b': 2, 'c': 3}
dict2 = {'d': 4, 'e': 5, 'a': 6}
keys1 = dict1.keys()
keys2 = dict2.keys()
union = set(keys1) | set(keys2)
intersection = set(keys1) & set(keys2)
difference = set(keys1) - set(keys2)
print("并集：", union)
print("交集：", intersection)
print("差集：", difference)