将列表或字符串转换为字典，并仅返回该字典中的特定键/值

my_list = [("key1", "value1"), ("key2", "value2"), ("key3", "value3")]
my_dict = {key: value for key, value in my_list}

my_list = ["value1", "value2", "value3"]
my_dict = {index: value for index, value in enumerate(my_list)}

my_string = "{'key1': 'value1', 'key2': 'value2', 'key3': 'value3'}"
my_dict = eval(my_string)

my_dict = {"key1": "value1", "key2": "value2", "key3": "value3"}
specific_keys = ["key1", "key3"]
filtered_dict = {key: value for key, value in my_dict.items() if key in specific_keys}

my_dict = {"key1": "value1", "key2": "value2", "key3": "value3"}
specific_values = ["value1", "value3"]
filtered_dict = {key: value for key, value in my_dict.items() if value in specific_values}