过滤字典中的日期- python

def filter_dates(dictionary):
    filtered_dict = {}
    for key, value in dictionary.items():
        if isinstance(value, str) and value.isdigit() and len(value) == 8:
            filtered_dict[key] = value
    return filtered_dict

# 示例字典
my_dict = {
    "name": "John",
    "age": 25,
    "dob": "19960101",
    "address": "123 Street",
    "phone": "1234567890"
}

# 过滤字典中的日期
filtered_dict = filter_dates(my_dict)

# 打印过滤后的字典
print(filtered_dict)

{'dob': '19960101'}