auto save

3.py

+import tkinter
+from tkinter import *
+
+alist = ["星期六下午打篮球", "星期天下午和小美一起看电影", 
+        "12月18日给蒂法过生日","12.24送妈妈圣诞礼物"]
+        
+class Note():       # 便签、笔记
+    def __init__(self):
+        self.root = tkinter.Tk()
+        self.root.geometry('300x340+1000+200')
+        self.root.title("我的便签-待办事项")
+        self.root.resizable(width=False, height=False)  
+        # self.bg_img=tkinter.PhotoImage(file="bg.png")  #导入图片
+    def show(self):     # 布置窗口界面
+        #画布
+        self.canvas=tkinter.Canvas(self.root,width=300,height=340,bg='lightblue')
+        # self.canvas.create_image(0,0,image=self.bg_img,anchor=NW)
+        self.canvas.place(x=0,y=0)
+        # 输入框
+        self.ent = tkinter.Entry(self.root, show=None, 
+                   font=('宋体', 13), bg="snow", width=25)
+        self.ent.place(x=10, y=310)
+        # 按钮
+        self.but = tkinter.Button(self.root,text='添加',font=('宋体',12),
+                   bg="lightblue", width=5, command=self.get_info)
+        self.but.place(x=240, y=305)
+        
+        #利用遍历展示所有文字
+        self.y=20
+        for info  in alist:
+            self.canvas.create_text(40,self.y,text=info,font=('宋体',11),anchor=W,fill='#FF4514')
+            self.y+=30
+    def get_info(self):
+        info = self.ent.get() # 获取数据
+        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='#FFA500')
+            self.y+=30
+
+app = Note()
+app.show()
+app.root.mainloop()
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