examples: add an python example (using GI) showing Wi-Fi networks

examples/python/gi/show-wifi-networks.py

@@ -0,0 +1,73 @@
+#!/usr/bin/env python
+# coding=utf-8
+# -*- Mode: Python; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+# vim: ft=python ts=4 sts=4 sw=4 et ai
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU 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 General Public License for more details.
+#
+# You should have received a copy of the GNU 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) 2013 Red Hat, Inc.
+#
+
+from gi.repository import NetworkManager, NMClient
+
+#
+# This example lists Wi-Fi access points NetworkManager scanned on Wi-Fi devices.
+# It calls libnm-glib functions using GObject introspection.
+#
+# Note the second line of the file: coding=utf-8
+# It is necessary because we use unicode characters and python would produce
+# an error without it: http://www.python.org/dev/peps/pep-0263/
+#
+
+signal_bars = {
+    0 : "____",
+    1 : "▂___",
+    2 : "▂▄__",
+    3 : "▂▄▆_",
+    4 : "▂▄▆█"
+}
+
+def clamp(value, minvalue, maxvalue):
+    return max(minvalue, min(value, maxvalue))
+
+def print_device_info(device):
+    active_ap = dev.get_active_access_point()
+    ssid = None
+    if active_ap is not None:
+        ssid = active_ap.get_ssid()
+    info = "Device: %s | Driver: %s | Active AP: %s" % (dev.get_iface(), dev.get_driver(), ssid)
+    print info
+    print '=' * len(info)
+
+def print_ap_info(ap):
+    strength = ap.get_strength()
+    frequency = ap.get_frequency()
+    print "SSID:      %s"      % (ap.get_ssid())
+    print "BSSID:     %s"      % (ap.get_bssid())
+    print "Frequency: %s"      % (frequency)
+    print "Channel:   %s"      % (NetworkManager.utils_wifi_freq_to_channel(frequency))
+    print "Strength:  %s %s%%" % (signal_bars[(clamp(strength-5, 0, 99)+24)/25], strength)
+    print
+
+if __name__ == "__main__":
+    nmc = NMClient.Client.new()
+    devs = nmc.get_devices()
+
+    for dev in devs:
+        if dev.get_device_type() == NetworkManager.DeviceType.WIFI:
+            print_device_info(dev)
+            for ap in dev.get_access_points():
+                print_ap_info(ap)
+