auto save

p.py

+a="依依"
+b="123"
+while True:
+    a1=input("用户名")
+    b1=input("密码")
+    if a1==a and b1==b:
+        print("成功")
+        break
+    if a1!=a:
+        print("用户")
+    if b1!=b:
+        print("m")
+print("欢迎")
\ No newline at end of file

u.py

+user="依依"
+mima="1111"
+while True:
+    user1=input("请输入用户名:")
+    mima1=input("请输入密码:")
+    if user1==user and  mima1==mima: 
+        print("登陆成功")  
+        break 
+    if  mima1!=mima:
+        print("密码错误")
+    if  user1!=user :    
+        print("用户名错误")
+    
+print("欢迎回来")