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diy.py

-# 和你的小伙伴用列表讲讲桃园结义的故事，并说说这其中运用了哪些列表知识：
-# 来，我给你起个头~
-# 从前啊，有三个bro，分别是：刘备、关羽、张飞...
\ No newline at end of file
+"""
+name="牛魔王"
+power=100
+b=["小虾米",30,"小虾米1",40,"小虾米2",50,"小虾米3",60]
+for i in range(len(b)):
+    if i%2==1 and power>b[i]:
+        b.insert(i+1,name)
+        b.insert(i+2,power)
+        break
+print(b)
+"""
+"""
+a=["关羽","刘备","张飞"]
+a.insert(2,"赵云")
+
+a.extend(["黄忠","魏延"])
+print(a)
+"""
+"""
+a=[0,1,2,3,4,5,6]
+b=[0,1,2,3,4,5,6,7,8,9,10]
+a.extend(b[-4:1])
+print(a)
+"""
+"""
+a=[0,100]
+while True:
+    b=input("请输入0-100的整数\n")
+    c=int(b)
+    for i in range(len(a)):
+        if c<a[i] and c not in a:
+            a.insert(i,c)
+            break
+    print(a)
+
+"""
+"""
+a=[0,1,2,3,4,5,6,7,8,9,10]
+for i in range(len(a)):
+    if i%2==0:
+        print(a[i])
+"""
+x=username="python"
+y=userpassword="123456"
+i=0#用户名错误次数
+j=0#密码错误次数
+while True:
+    if i==3:
+        exit(0)
+    while i!=0:
+        print("您还有",3-i,"次机会")
+        break
+    a=input("请输入用户名\n")
+    if a==x:
+        break
+    else:
+        i=i+1
+        print("用户名错误")
+while True:
+    if j==3:
+        exit(0)
+    if j==1:
+        print("您还有两次机会")
+    if j==2:
+        print("您还有一次机会")
+    b=input("请输入密码\n")
+    if b==y:
+        break
+    else:
+        j=j+1
+        print("密码错误")
+print("登录成功")