diff --git a/contextmenu.py b/contextmenu.py
index 4051a49..56d998c 100644
--- a/contextmenu.py
+++ b/contextmenu.py
@@ -1,9 +1,13 @@
-from tkinter import *
-root = Tk()
-menu = Menu(root)
+# contextmenu.py
+
+import tkinter
+from tkinter import ttk
+
+root = tkinter.Tk()
+menu = tkinter.Menu(root)
 for i in ('One', 'Two', 'Three'):
     menu.add_command(label=i)
-if (root.tk.call('tk', 'windowingsystem')=='aqua'):
+if root.tk.call('tk', 'windowingsystem') == 'aqua':
     root.bind('<2>', lambda e: menu.post(e.x_root, e.y_root))
     root.bind('<Control-1>', lambda e: menu.post(e.x_root, e.y_root))
 else: