save project

my_tree.py

-import turtle
-import random
-
-pen = turtle.Turtle()
-pen.color('sienna')
-pen.sheep=0.1
-# 画布大小
-w = turtle.Screen()
-w.bgcolor('wheat')      # wheat小麦
-
-# 移动到起点
-pen.left(90)
-pen.up()
-pen.backward(150)    # 后退
-pen.down()
-
-def tree(n):
-    if n >=0:
-        if n <= 12:
-            color_list = ['snow','lightcoral']
-            color = random.choice(color_list)
-            pen.color(color)
-            pen.pensize(n / 3)
+i=3
+username="python"
+userpassword="123456"
+while True:
+    if i>0
+    name = input("请输入用户名")
+    password = input("请输入密码")
+    i-=1
+    if name == username and password == userpassword:
+        print("登入成功！")
+        break
+    if name != username:
+        print("用户名不存在,请重新输入!")
+        continue
+    if password != userpassword:
+        print("密码输入有误,请重新输入！")
     else:
     else:
-            pen.color('sienna')
-            pen.pensize(n / 10)
-        pen.forward(n)
-        angle = random.random()
+        print("你的账号已被锁定,请一个小时再来")
+        exit()
+print("欢迎来到贝尔编程！")
\ No newline at end of file
-        pen.right(30*angle)
-        length = 1.5*random.random()
-        tree(n-10*length)
-        pen.left(60*angle)
-        tree(n-10*length)
-        pen.right(30*angle)
-        pen.up()
-        pen.backward(n)
-        pen.down()
-
-tree(60)
-turtle.done()