Updated

app.py

@@ -0,0 +1,18 @@
+import tkinter as tk
+
+root = tk.Tk()
+
+canvas1 = tk.Canvas(root, width=300, height=300)
+canvas1.pack()
+
+
+def hello():
+    label1 = tk.Label(root, text='Hello World!', fg='blue',
+                      font=('helvetica', 12, 'bold'))
+    canvas1.create_window(150, 200, window=label1)
+
+
+button1 = tk.Button(text='Click Me', command=hello, bg='brown', fg='white')
+canvas1.create_window(150, 150, window=button1)
+
+root.mainloop()