def todo_list():
print 'Welcome to MiYE service system!'
print 'Please choose the service you want:'
print '1. Make a reservation or check the availability'
print '2. Cancel a reservation'
print '3. Print the bill for the customer'
print '4. Use Maintenance Interface'
input = raw_input('What do you want to do(Select an option):')
if input == '1':
makereservation()
elif input == '2':
cancelreservation()
elif input == '3':
printbill()
# Next iteration
# elif input == '4':
# # maintainsystem()
else:
print '\n' + 'You should input the number between 1 and 4\n'
while True:
print 'Welcome to MiYE service system!'
print 'Please choose the service you want:'
print '1. Make a reservation'
print '2. Check availability of services by date and time'
print '3. Check availability of services by service in 5 days'
print '4. Cancel a reservation'
print '5. Print the bill for the customer'
print '6. Use Maintenance Interface <New Customer ID>'
print '7. Exit'
print
input = raw_input('What do you want to do (Select an option):')
if input == '1':
makereservation(Customers, Services)
save_object_state(Customers, Services)
elif input == '2':
check_avail_dtime(Services)
elif input == '3':
check_by_service(Services)
elif input == '4':
cancel_reservation(Customers, Services)
save_object_state(Customers, Services)
elif input == '5':
printbill(Customers)
elif input == '6':
maintenance_interface(Customers, Services)
elif input == '7':
print 'Thank you for using the system!'
break