python - 使用 python 列表中嵌套字典中存储的值验证作为用户输入的出生日期

Question

我正在尝试验证从用户处获取的出生日期并将其与字典数据库中存储的值进行比较。但即使我输入了正确的出生日期值，它也不会验证该值。这是我的代码:

from collections import defaultdict



accountDetails = [
    {"FirtsName": "JOHN", "LastName": "DENIS","date of Birth": "01-06-1992", "Account Number": "432524352345234", "Account Balance": "50000"},
    {"FirtsName": "AKASH", "LastName": "MAHAJAN", "date of Birth": "04-02-1995","Account Number": "432524352345234", "Account Balance": "50000"},
    {"FirtsName": "AMAN", "LastName": "RANA","date of Birth": "11-04-1996", "Account Number": "432524352345234", "Account Balance": "50000"},
    {"FirtsName": "ANKUR", "LastName": "JAIN","date of Birth": "21-05-1990", "Account Number": "432524352345234", "Account Balance": "50000"},
]


d = defaultdict(lambda: defaultdict(dict))
for item in accountDetails:
    d[item['FirtsName']][item['LastName']][item['date of Birth']] = item

# get valid first name
while True:
    first_name_input = input('Enter First Name:\n').upper()
    if first_name_input in d:
        break
    else:
        print('Enter valid First Name')

# get valid last name
while True:
    last_name_input = input('Enter Last Name:\n').upper()
    if last_name_input in d[first_name_input]:
        break
    else:
        print('Enter valid Last Name')
                         # get valid last name
while True:
    dob_input = input('Enter dob:\n')
    if  dob_input in d[first_name_input]:
        break
    else:
        print('Enter valid dob')


print(d[first_name_input][last_name_input])

用户已将值设置为-04-02-1995

Answer 1

您需要在嵌套字典的第二层中测试键:

while True:
    dob_input = input('Enter dob:\n')
    if dob_input in d[first_name_input][last_name_input]:
        break
    else:
        print('Enter valid dob')

当您打印您创建的嵌套字典的结构时，这一点就会变得清晰:

print(d)

defaultdict(<function __main__.<lambda>>,
            {'AKASH': defaultdict(dict,
                         {'MAHAJAN': {'04-02-1995': {'Account Balance': '50000',
                            'Account Number': '432524352345234',
                            'FirtsName': 'AKASH',
                            'LastName': 'MAHAJAN',
                            'date of Birth': '04-02-1995'}}}),
             ...
             'JOHN': defaultdict(dict,
                         {'DENIS': {'01-06-1992': {'Account Balance': '50000',
                            'Account Number': '432524352345234',
                            'FirtsName': 'JOHN',
                            'LastName': 'DENIS',
                            'date of Birth': '01-06-1992'}}})})