import json
filename = 'lovenum.json'

with open(filename) as obj:
	i = obj.read()
	i = int(i)
	x = input('set a num : ')
	x = int(x)
	if x == i:
		print('\n\ti know u favorite num is : '+str(i))
	
	else:
		x = input('please tell me you favorite num : ')
		x = int(x)
		with open(filename,'w') as obj:
			json.dump(x,obj)
			print('\n\tOK ,im remember U favorite num: '+str(x))