Updater: refact as a class

Updater.py

@@ -5,34 +5,39 @@ from tkinter.messagebox import *
 
 import subprocess
 
-file = None
-def Install():
 
-	ip = e.get()
-	print ("Installing ",file)
-	print ("At ip ", ip)
+class Updater(Frame):
+    file = None
 
-	if file != None:
-		subprocess.call(["python", "espota.py", "-i", ip, "-f", file])
-	else:
-		showerror("Error", "Select a firmware first")
+    def __init__(self, win, **kwargs):
+        Frame.__init__(self, win, **kwargs)
+        button_opt = {'fill': constants.BOTH, 'padx': 5, 'pady': 5}
+        Button(root, text='Select firmware',
+               command=self.askopenfile).pack(**button_opt)
 
+        self.ipEntry = Entry(root)
+        self.ipEntry.pack()
+        self.ipEntry.delete(0, END)
+        self.ipEntry.insert(0, "192.168.0.XX")
 
-def askopenfile():
-	global file
-	file = filedialog.askopenfilename(title='Select Firmware', filetypes=[('binaries', '*.bin')])
+        Button(root, text='Install', command=self.install).pack(pady=20)
+
+    def install(self):
+        ip = self.ipEntry.get()
+        print("Installing", self.file, "at ip", ip)
+
+        if self.file != None:
+            subprocess.call(["python", "espota.py", "-i", ip, "-f", self.file])
+        else:
+            showerror("Error", "Select a firmware first")
+
+    def askopenfile(self):
+        self.file = filedialog.askopenfilename(
+            title='Select Firmware', filetypes=[('binaries', '*.bin')])
 
 root = Tk()
 root.title("Firmware Updater")
 
-button_opt = {'fill': constants.BOTH, 'padx': 5, 'pady': 5}
-Button(root, text='Select firmware', command=askopenfile).pack(**button_opt)
-
-e = Entry(root)
-e.pack()
-e.delete(0, END)
-e.insert(0, "192.168.0.XX")
-
-Button(root, text = 'Install', command = Install).pack(pady=20)
-
-root.mainloop()
+updater = Updater(root)
+updater.mainloop()
+updater.destroy()