auto save

my_window.py

 import tkinter
+root = tkinter.Tk()
+root.title("注册")
+root.geometry("400x300+500+200")
+#None
+e1 = tkinter.Entry(root,show=None,font=('宋体',14),bg="light grey",width=18)
+e1.place(x=140,y=80)
 
+e2 = tkinter.Entry(root,show="*",font=('宋体',14),width=18)
+e2.place(x=140,y=140)
+
+e3 = tkinter.Entry(root,show="*",font=('宋体',14),width=18)
+e3.place(x=140,y=200)
+
+lab = tkinter.Label(root,text='您好！请填写注册信息',font=('宋体',15),
+      fg="black",width=40, height=2,bg="green")
+lab.place(x=0,y=0)
+
+
+root.mainloop()
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