save project

a.py

-import turtle
-pen=turtle.Pen()
-screen=turtle.Screen()
-screen.bgcolor("black")
-pen.speed(0.0001)
-color=["red","orange","yellow","blue"]
-a=0
-for i in range(1,6000,2):
-    pen.pencolor(color[a])
-    pen.forward(i)
-    a+=1
-    if a==4:
-        a=0
-    pen.right(91)
-pen.hideturtle()
-turtle.done()
\ No newline at end of file
+username="python"
+userpassword="123456"
+i=3
+while True:
+    if i>0:
+        name=input("请输入账号:")
+        password=input("请输入密码:")
+        i-=1
+
+
+        if name == username and password == userpassword:
+            print("输入成功")
+            break 
+        if name != username:
+            print("用户名错误")
+            continue
+            print("你还有"+str(i)+"次机会")
+        if password != userpassword:
+            print("密码错误")
+    else:
+        print("已锁定")       
+        exit()
+
+print("欢迎来到贝尔编程")
\ No newline at end of file