class UI:
def __init__(self):
self.__grammar = Grammar()
@staticmethod
def print_menu():
print('Options are:')
print(' 0 - Exit')
print(' 1 - See non-terminals')
print(' 2 - See terminals')
print(' 3 - See productions')
print(' 4 - See start')
def run(self):
while True:
UI.print_menu()
option = input('Enter option: ')
if option == '0':
break
elif option == '1':
print(self.__grammar.get_non_terminals_string())
elif option == '2':
print(self.__grammar.get_terminals_string())
elif option == '3':
print(self.__grammar.get_productions_string())
elif option == '4':
print(self.__grammar.start)
else:
print('Incorrect option')
