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python_scripts/peopleathome.py

@@ -0,0 +1,10 @@
+home = 0
+for entity_id in hass.states.entity_ids('device_tracker'):
+    state = hass.states.get(entity_id)
+    if state.state == 'home':
+        home = home + 1
+
+hass.states.set('sensor.people_home', home, {
+    'unit_of_measurement': 'people',
+    'friendly_name': 'People home'
+})