Add AGI script example.

examples/agi_script.py

@@ -0,0 +1,22 @@
+#!/usr/bin/python
+
+"""
+Example to get and set variables via AGI.
+
+You can call directly this script with AGI() in Asterisk dialplan.
+"""
+
+from asterisk.agi import *
+
+agi = AGI()
+
+agi.verbose("python agi started")
+
+# Get variable environment
+extension = agi.env['agi_extension']
+
+# Get variable in dialplan
+phone_exten = agi.get_variable('PHONE_EXTEN')
+
+# Set variable, it will be available in dialplan
+agi.set_variable('EXT_CALLERID', '1')