expertsys.py

import sys
symptoms={
	'tb' : ['cough', 'pain', 'weight loss', 'exhaustion', 'fever','night sweat','chills'], 
	'dengue': ['pain', 'swollen lympth node', 'fever', 'exhaustion'], 
	'h1n1' : ['cough', 'fever', 'sore throat', 'runny nose', 'pain', 'headache', 'chills', 'exhaustion']
}
print 'do you have fever?'
fever = input()
if fever==0:
	sys.exit()
print 'are you experiencing pain? '
pain = input()
if pain:
	print 'you might have tb, dengue or h1n1'
print 'do you have any kind of cough?'
cough = input()
if cough:
	print 'you might have dengue or tb'
	print 'please answer these questions now...'
	print 'do you have a swollen lymth node?'
	if input()==1:
		print 'you have dengue'
	else:
		print 'you have tb or h1n1'
		print 'now answer the following questions: '
		print 'do you have a chills'
		if input()==1:
			print 'still not decided if tb or h1n1'
		print 'do you have a running nose?'
		if input()==1:
			print 'you have tb'
			sys.exit()
		print 'are you experiencing sore throad?'
		if input()==1:
			print 'yyou have h1n1'
			sys.exit()
		else:
			print 'you might only have a common fever'