add class TunnelActive to wg_func works

wg_func.py

@@ -29,17 +29,16 @@ class Message(tk.Tk):
         self.button.grid(column=0, row=1)
 
 
-def active():  # Shows the active tunnel
-    a = os.popen('nmcli con show --active | grep -iPo "(.*)(wireguard)"').read().split()
-    if not a:
-        a = ''
-        return a
-    else:
-        a = a[0]
-        return a
+class TunnelActiv:
+    @staticmethod
+    def active():  # Shows the active tunnel
+        active = os.popen('nmcli con show --active | grep -iPo "(.*)(wireguard)"').read().split()
+        if not active:
+            active = ''
+        else:
+            active = active[0]
 
-
-a = active()
+        return active
 
 
 def tl_list():
@@ -61,13 +60,13 @@ def wg_import_select():
             if len(pathsplit1) > 17:
                 pathsplit = pathsplit1[len(pathsplit1) - 17:]
                 os.rename(filepath, os.environ['HOME'] + '/tester/' + str(pathsplit))
-                os.system('nmcli connection down ' + str(a))
+                os.system('nmcli connection down ' + str(TunnelActiv.active()))
                 os.system('nmcli connection import type wireguard file ' + os.environ['HOME'] + '/tester/' +
                           str(pathsplit))
                 os.system('nmcli con mod ' + str(pathsplit[:-5]) + ' connection.autoconnect no')
             else:
                 subprocess.call('cp ' + str(filepath) + ' ' + os.environ['HOME'] + '/tester/', shell=True)
-                os.system('nmcli connection down ' + str(a))
+                os.system('nmcli connection down ' + str(TunnelActiv.active()))
                 os.system('nmcli connection import type wireguard file ' + str(filepath))
                 os.system('nmcli con mod ' + str(pathsplit1[:-5]) + ' connection.autoconnect no')
         if "PrivateKey = " not in read: