examples: add modem watcher example in python

examples/modem-watcher-python/modem-watcher-python

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+#!/usr/bin/env python
+# -*- Mode: python; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+#
+# This program is free software; you can redistribute it and/or modify it under
+# the terms of the GNU Lesser General Public License as published by the Free
+# Software Foundation; either version 2 of the License, or (at your option) any
+# later version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Lesser General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc., 51
+# Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# Copyright (C) 2014 Aleksander Morgado <aleksander@aleksander.es>
+#
+
+import sys, signal
+import ModemWatcher
+from gi.repository import GLib
+
+main_loop = None
+watcher = None
+
+def signal_handler(data):
+    main_loop.quit()
+
+if __name__ == "__main__":
+    # Create modem watcher
+    watcher = ModemWatcher.ModemWatcher()
+
+    # Main loop
+    main_loop = GLib.MainLoop()
+    GLib.unix_signal_add(GLib.PRIORITY_HIGH, signal.SIGHUP, signal_handler, None)
+    GLib.unix_signal_add(GLib.PRIORITY_HIGH, signal.SIGTERM, signal_handler, None)
+    try:
+        main_loop.run()
+    except KeyboardInterrupt:
+        pass