save project

diy2.py

+username = "python"
+userpassword = "123456"
+a=3
+b=3
+while True:
+    name = input("请输入用户名:")
+    if not name == username:
+        print("用户名错误!请重新输入")
+        a=a-1
+        print("还有"+str(a)+"次机会")
+        if a==0:
+            break
+        continue
+    password = input("请输入密码:")
+    if not password == userpassword:
+        print("密码错误!请重新输入")
+        b=b-1
+        print("还有"+str(b)+"次机会")
+        if a==0:
+            break
+        continue
+    if name == username and password == userpassword:
+        print("登录成功!")
+        print("欢迎来到贝尔编程!")
+        break
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