djfz-2019-s426197/TaskB02/run.py

import re
import sys

atandt_desc_pattern = re.compile(r"^([0-9]+)[ \t]([0-9]+)[ \t](\S+)([ \t][0-9]+(\.[0-9]+)?)?$") #^([0-9]+)[ \t]([0-9]+)[ \t](\S+)([ \t][0-9]+(\.[0-9]+)?)?$
atandt_accepted_state_pattern = re.compile(r"^[0-9]+$")

current_state = 0
accept_states = []

state_move = {}

for line in sys.stdin:
    line = line.replace('\n', '')
    move = atandt_desc_pattern.match(line)
    succes = atandt_accepted_state_pattern.match(line)
    if move:
        if move.group(4):
            state_move[(int(move.group(1)), move.group(3))] = (int(move.group(2)), float(move.group(4)))
        else:
            state_move[(int(move.group(1)), move.group(3))] = (int(move.group(2)), 0)
    if succes:
        accept_states.append(int(line))
print(state_move)

with open(sys.argv[1], 'r') as f:
    for word in f:
        # starting with from 0 node because that is atandt standard
        current_state = 0
        word = word.replace('\n', '')
        character_number = 0
        # checking what is next state based on current character from word
        while character_number < len(word):  
            #print('State: {current_state} and character: {char} on index {character_number}'.format(current_state = current_state, char = word[character_number], character_number = character_number)) 
            if ((current_state, word[character_number]) in state_move):
                current_state = state_move[(current_state, word[character_number])][0]
                character_number += 1
            # if there is epsilon program move to pointed node but didnt count epsilon as character 
            elif ((current_state, '<eps>') in state_move):
                current_state = state_move[(current_state, '<eps>')][0]
            else:
                current_state = -1
                character_number += 1
            #print('State after {char} letter: {current_state} and index {character_number}'.format(current_state = current_state, char = word[character_number - 1], character_number = character_number)) 
        
        #print('State after consuming whole word: {current_state}'.format(current_state = current_state))
        while ((current_state, '<eps>') in state_move):
            current_state = state_move[(current_state, '<eps>')][0]
            
        if (current_state in accept_states):
            print("YES " + word)
        else:
            print("NO " + word)