if opt == '2':
if not regex:
print('\n\tERR: You need to set a regular expression first!')
opt = None
else:
print(submenu)
method = input('> ')
if method == '1':
print(thompson_msg)
print(type_string_msg)
regex_input = input('> ')
nfa = NFA(tree, reader.GetSymbols(), regex_input)
start_time = process_time()
nfa_regex = nfa.EvalRegex()
stop_time = process_time()
print('\nTime to evaluate: {:.5E} seconds'.format(
stop_time - start_time))
print('Does the string belongs to the regex (NFA)?')
print('>', nfa_regex)
dfa = DFA(nfa.trans_func, nfa.symbols, nfa.curr_state,
nfa.accepting_states, regex_input)
dfa.TransformNFAToDFA()
start_time = process_time()
dfa_regex = dfa.EvalRegex()
stop_time = process_time()
print('\nTime to evaluate: {:.5E} seconds'.format(
stop_time - start_time))
