diff --git a/debug2/demo.md b/debug2/demo.md
new file mode 100644
index 0000000..83c831f
--- /dev/null
+++ b/debug2/demo.md
@@ -0,0 +1 @@
+# test
diff --git a/debug2/test.py b/debug2/test.py
new file mode 100644
index 0000000..b2ade2c
--- /dev/null
+++ b/debug2/test.py
@@ -0,0 +1,45 @@
+from tkinter import *
+
+
+def run1():
+    a = float(inp1.get())
+    b = float(inp2.get())
+    s = '%0.2f+%0.2f=%0.2f\n' % (a, b, a + b)
+    txt.insert(END, s)   # 追加显示运算结果
+    inp1.delete(0, END)  # 清空输入
+    inp2.delete(0, END)  # 清空输入
+
+
+def run2(x, y):
+    a = float(x)
+    b = float(y)
+    s = '%0.2f+%0.2f=%0.2f\n' % (a, b, a + b)
+    txt.insert(END, s)   # 追加显示运算结果
+    inp1.delete(0, END)  # 清空输入
+    inp2.delete(0, END)  # 清空输入
+
+
+root = Tk()
+root.geometry('460x240')
+root.title('简单加法器')
+
+lb1 = Label(root, text='请输入两个数，按下面两个按钮之一进行加法计算')
+lb1.place(relx=0.1, rely=0.1, relwidth=0.8, relheight=0.1)
+inp1 = Entry(root)
+inp1.place(relx=0.1, rely=0.2, relwidth=0.3, relheight=0.1)
+inp2 = Entry(root)
+inp2.place(relx=0.6, rely=0.2, relwidth=0.3, relheight=0.1)
+
+# 方法-直接调用 run1()
+btn1 = Button(root, text='方法一', command=run1)
+btn1.place(relx=0.1, rely=0.4, relwidth=0.3, relheight=0.1)
+'''
+# 方法二利用 lambda 传参数调用run2()
+btn2 = Button(root, text='方法二', command=lambda: run2(inp1.get(), inp2.get()))
+btn2.place(relx=0.6, rely=0.4, relwidth=0.3, relheight=0.1)
+'''
+# 在窗体垂直自上而下位置60%处起，布局相对窗体高度40%高的文本框
+txt = Text(root)
+txt.place(rely=0.6, relheight=0.4)
+
+root.mainloop()