如何将列表值映射到字典中，并将列表值与字典值进行比较？

# 示例列表
fruits = ['apple', 'banana', 'cherry']

# 将列表元素作为键，值设为None
fruit_dict = {fruit: None for fruit in fruits}
print(fruit_dict)

# 将列表元素作为值，键设为索引
fruit_dict_index = {index: fruit for index, fruit in enumerate(fruits)}
print(fruit_dict_index)

# 比较列表值与字典值
for fruit in fruits:
    if fruit in fruit_dict:
        print(f"{fruit} exists in the dictionary with key {fruit}")
    else:
        print(f"{fruit} does not exist in the dictionary")

for index, fruit in enumerate(fruits):
    if fruit_dict_index[index] == fruit:
        print(f"Index {index} matches the fruit {fruit}")
    else:
        print(f"Index {index} does not match the fruit {fruit}")

# 去除重复元素
unique_fruits = list(set(fruits))
fruit_dict = {fruit: None for fruit in unique_fruits}

# 确保类型一致
for fruit in fruits:
    if fruit in fruit_dict and fruit_dict[fruit] == expected_value:
        print(f"{fruit} matches the expected value")