python 多維數組 字典

#多維數組
list = [[87,57,98],[34,87,90]]
print(list[1][0])

l = [[87,57,98],[34,87,[90,99,67]]]
print(l[1][2][1])

#字典 key-value
flightplan = {'flight':'2019-10-26','dep':'重慶','arr':'杭州','flightno':'CA1889'}
print(flightplan['flightno'])
print(flightplan['flight'])
print(flightplan.get('dep'))
print(flightplan.get('arr'))
flightplan['deptime'] = '0900'
flightplan.setdefault('arrtime','1000')
print(flightplan)
#增加
flightplan['flightno'] = 'CA1234'  #中括號方式增加，若該字段已經存在，會修改原有字段的參數值
print(flightplan)
flightplan.setdefault('flightno','CA1998') #中括號方式增加，若該字段已經存在，原有參數值不變
print(flightplan)
#修改
flightplan['dep'] = '成都'
flightplan.update(arr = '曼谷')
print(flightplan)
#刪除
flightplan.pop('deptime')
print(flightplan)

#注冊
# 1、輸入用戶名、密碼、確認密碼
# 2、判斷輸入的有效性
# 3、若有效，數據新增
# 4、若超過輸入次數，退出
users = {}
for i in range(3):
    username = input('請輸入用戶名：')
    passwd = input('請輸入用戶名：')
    apasswd = input('請輸入用戶名：')
    if username  in users.keys():
        print('用戶名已存在')
    elif len(username) == 0 or len(passwd) == 0 or len(apasswd) == 0:
        print('存在必填項為空')
    elif username.isspace() or passwd.isspace() or apasswd.isspace():
        print('存在必填項為空')
    else:
        if passwd != apasswd:
            print('請輸入相同的密碼')
        else:
            users[username] = passwd
            print('注冊成功',users)
#登錄

# 1、判斷用戶名是否存在
# 2、若存在、判斷密碼是否正確
# 3、若超過輸入次數、退出

for j in range(3):
    username = input('請輸入用戶名：')
    passwd = input('請輸入用戶名：')
    if username not in users:
        print('用戶名或密碼錯誤')
    else:
        if passwd != users.get(username):
            print('用戶名或密碼錯誤')
        else:
            print('登錄成功')
            break
    if j == 2:
        print('錯誤次數過多，已鎖定')
        break

len(info['xioayuan']['cars']['china'])