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a=[1,2,3,4,5,6]
#方法一
a=a[::-1]
print(a)
#方法二
a.reverse()
print(a)
#方法三
a.sort(reverse=True)
print(a)

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import random
i=1
temp=random.randint(0,11)
guess = int(input("请输入:"))
#用户猜测的数字
while i<=9:
    i+=1
    if temp!=guess:
        guess=int(input(("猜错了，请重新输入：")))
    while guess==temp:
        temp=random.randint(0,11)
        if guess!=temp:
            continue
print(f"guess={guess},temp={temp}")

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lst1=[11,22,33]
lst2=[22,33,44]
for i in range(0,3):
    for j in range(0,3):
        if lst1[i]==lst2[j]:
            print(lst1[i])

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import random
ale=['教师1', '教师2', '教师3', '教师4', '教师5', '教师6', '教师7', '教师8']
# print(ale[1])
def classrom():
    class1=[]
    class2=[]
    class3=[]
    num=7
    for i in range(0,3):
        a=random.randint(0,num)
        class1.append(ale[a])
        ale.remove(ale[a])
        num-=1
    for i in range(0,3):
        a=random.randint(0,num)
        class2.append(ale[a])
        ale.remove(ale[a])
        num-=1
    for i in range(0,2):
        a=random.randint(0,num)
        class3.append(ale[a])
        ale.remove(ale[a])
        num-=1
    print(class1)
    print(class2)
    print(class3)
classrom()

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guess=input("请输入：")#用户账号
while str!="":
    if (guess[0].isalpha())==False:
        guess=input("账号输入错误(首字母不能为数字)，请重新输入：")
    if (guess[0].isalpha())==True:
        break
while str!="":
    if len(guess)<6 or len(guess)>20:
        guess=input("账号输入错误(字数不够)，请重新输入：")
    else:
        break
while (type(guess[0])==str)==False and len(guess)<6 or len(guess)>20:
    guess=input("账号输入错误,请重新输入：")
# while 6<=len(guess)<=20 and (guess[0].isalpha())==True:
while 6 <= len(guess) <= 20 and (guess[0].isalpha()) == True:
    temp = input("请输入密码：")
    #2、密码长度至少6位，不能为纯数字，不能有空格
    if temp!="":
        while len(temp)<6:
            temp=input("密码输入错误（最少为6位），请重新输入：")
            if len(temp)>=6:
                break
        while temp.isdigit()==True:
            temp = input("密码输入错误（纯数字），请重新输入：")
            if temp.isdigit()==False:
                break
        while " " in temp:
            temp=input("密码输入错误（有空格）,请重新输入：")
            if (" " in temp)==False:
                break
    if len(temp)>=6 and temp.isdigit()==False and (" " in temp)==False:
        break
while len(temp)>=6 and temp.isdigit()==False and (" " in temp)==False:
    print(f"账号为：{guess}")
    # print(temp)
    print(f"密码为：{temp}")
    print("账号密码输入正确")
    break