如何过滤字典中的特定值？

# 原始字典
original_dict = {'a': 1, 'b': 2, 'c': 3, 'd': 2}

# 过滤出值为2的键值对
filtered_dict = {k: v for k, v in original_dict.items() if v == 2}

print(filtered_dict)  # 输出: {'b': 2, 'd': 2}

# 原始字典
original_dict = {'a': 1, 'b': 2, 'c': 3, 'd': 2}

# 过滤出值为2的键值对
filtered_dict = dict(filter(lambda item: item[1] == 2, original_dict.items()))

print(filtered_dict)  # 输出: {'b': 2, 'd': 2}

# 原始字典
original_dict = {'a': 1, 'b': 2, 'c': 3, 'd': 2}

# 过滤出值为2的键值对
filtered_dict = {}
for key, value in original_dict.items():
    if value == 2:
        filtered_dict[key] = value

print(filtered_dict)  # 输出: {'b': 2, 'd': 2}