是否可以通过输入键在字典中返回带有值的元组？[复制]

# 创建一个字典
my_dict = {'a': 1, 'b': 2, 'c': 3}

# 通过键获取值并创建一个元组
key = 'b'
value = my_dict[key]
result_tuple = (key, value)

print(result_tuple)  # 输出: ('b', 2)

# 获取字典中所有的键值对元组
all_items = my_dict.items()

# 打印所有的键值对元组
for item in all_items:
    print(item)  # 输出: ('a', 1), ('b', 2), ('c', 3)

# 检查键是否存在
key = 'd'
if key in my_dict:
    value = my_dict[key]
    result_tuple = (key, value)
else:
    result_tuple = (key, None)  # 或者你可以设置一个默认值

print(result_tuple)  # 输出: ('d', None)