auto save

client.py

@@ -29,11 +29,12 @@ class Note():
             self.y += 30
     def get_info(self):
         info = self.ent.get()
-        self.ent.delete("0",END)
-        alist.append(info)
-        self.canvas.create_text(40,self.y,text=info,
-                    font=("宋体",11),anchor="w",fill='#FF9900'
-        self.y += 30
+        if info != "":
+            self.ent.delete("0",END)
+            alist.append(info)
+            self.canvas.create_text(40,self.y,text=info,
+                        font=("宋体",11),anchor="w",fill='#FF9900'
+            self.y += 30
 app = Note()
 app.show()
 app.root.mainloop()
\ No newline at end of file