我正在尝试验证用户的出生日期，并将其与词典数据库中存储的值进行比较。但是，即使我输入了正确的出生日期值，也无法验证该值。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])
用户已输入值as-04-02-1995
您需要在嵌套字典的第二级中对键进行测试：
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print创建嵌套字典的结构时，这一点变得很清楚：
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'}}})})
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