"""Example code"""
import expert # <a href='v0.1/expert.py'>download expert.py</a>
import rules1 # <a href='v0.1/rules1.py'>download rules1.py</a>

# This function determines if an answer has been found.
# (i.e. the system is in a 'final' state)
# It is run everytime a matched rule fires.
def is_final(facts):
	"""Return true when 'final_flag' is set"""
	return facts.get('final_flag')

# Initialize the expert engine
e = expert.Expert()

# Initialize rules in module 'rules1'
e.rules_init(rules1)

# Initial facts
e.facts.set('initial', True)

# The 'is_final' function is used to determine if an answer has been found.  
# The system stops when 'is_final' returns True
if e.get_answer(is_final):
	print "is_final() returned True, that means an answer has been found."
	print
	print "> Facts"
	e.facts.show()
	print
	print "> Log"
	e.logger.show()
else:
	print "No answer found!  This is probably a bad thing."