f00 nfa
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Adam
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8a33bb69fa
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159
TaskF00/run.py
159
TaskF00/run.py
@ -1,10 +1,8 @@
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import sys
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import os
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#./run test1.arg < test1.in > test1.out
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filename = sys.argv[1]
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# filename = 'long.arg'
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# filename = 'test1.arg'
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path = os.path.join(os.getcwd(), filename)
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file = open(path, 'r').readlines()
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@ -17,39 +15,154 @@ class FSA():
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self.alphabet = set()
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self.transition_function = []
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self.end_state = []
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self.all_states = set()
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self.is_nfa = 0
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def add_letter_to_alphabet(self, letter):
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self.alphabet.add(letter)
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def add_transition_to_transition_function(self, input_state, output_state, letter):
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self.all_states.add(input_state)
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self.all_states.add(output_state)
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if len(self.transition_function) > 0:
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for x, function in enumerate(self.transition_function):
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if function['in'] == input_state and function['out'] == output_state:
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self.transition_function[x]['letter'].append(letter)
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if function['in'] == input_state and function['letter'] == letter:
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self.transition_function[x]['out'].append(output_state)
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return
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obj = {'in': input_state, 'letter': [letter], 'out': output_state}
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obj = {'in': input_state, 'letter': letter, 'out': [output_state]}
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self.transition_function.append(obj)
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else:
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obj = {'in': input_state, 'letter':[letter], 'out': output_state}
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obj = {'in': input_state, 'letter': letter, 'out': [output_state]}
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self.transition_function.append(obj)
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# add letter to alphabet
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def specify_end_state(self, end_state):
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self.end_state.append(end_state)
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def check_text(self, text):
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for letter in text:
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if letter not in self.alphabet:
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return 'NO'
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found_function = None
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for func in self.transition_function:
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if func['in'] == self.current_state and letter in func['letter']:
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found_function = func
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if not found_function:
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return 'NO'
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self.current_state = found_function['out']
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# print('Input text:{} output text:{} current state:{}'.format(text, output_text, self.current_state))
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def nfa_to_dfa(self):
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nfa = dict()
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for x in FSA.all_states:
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nfa[x] = {}
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for a in FSA.alphabet:
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a_dict = {a: None}
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nfa[x].update(a_dict)
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for function in self.transition_function:
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nfa[function['in']][function['letter']] = function['out']
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trap_state_in = str(int(sorted(FSA.all_states, reverse=True)[0]) + 1)
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trap_state = {trap_state_in: {}}
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for a in FSA.alphabet:
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a_dict = {a: trap_state_in}
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trap_state[trap_state_in].update(a_dict)
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dfa = {}
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dfa_keys = []
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new_states_list = []
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dfa.update(trap_state)
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# first row
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state = FSA.initial_state
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nfa_function = nfa[state]
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dfa_keys.append(state)
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dfa_function = dict()
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for letter in FSA.alphabet:
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if not nfa_function[letter]:
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dfa_function[letter] = trap_state_in
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continue
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if nfa_function[letter] and len(nfa_function[letter]) > 1:
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new_state_in = ''.join(nfa_function[letter])
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for i in self.end_state:
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if i in nfa_function[letter]:
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self.specify_end_state(new_state_in)
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dfa_function[letter] = new_state_in
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new_states_list.append(new_state_in)
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continue
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if len(nfa_function[letter]) == 1:
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new_state = nfa_function[letter][0]
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dfa_function[letter] = new_state
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if new_state not in new_states_list:
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new_states_list.append(new_state)
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continue
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dfa[state] = dfa_function
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while len(new_states_list) != 0:
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new_dfa_state = new_states_list.pop(0)
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dfa_function = dict()
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if len(new_dfa_state) == 1:
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nfa_function = nfa[new_dfa_state]
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for letter in FSA.alphabet:
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if not nfa_function[letter]:
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dfa_function[letter] = trap_state_in
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continue
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if nfa_function[letter] and len(nfa_function[letter]) > 1:
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new_state_in = ''.join(nfa_function[letter])
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for i in self.end_state:
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if i in nfa_function[letter]:
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self.specify_end_state(new_state_in)
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dfa_function[letter] = new_state_in
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if new_state_in not in dfa_keys and new_state_in not in new_states_list:
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new_states_list.append(new_state_in)
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continue
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if len(nfa_function[letter]) == 1:
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new_state_in = nfa_function[letter][0]
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dfa_function[letter] = new_state_in
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if new_state_in not in dfa_keys and new_state_in not in new_states_list:
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new_states_list.append(new_state_in)
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continue
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dfa[new_dfa_state] = dfa_function
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else:
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dfa_func = {}
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for letter in FSA.alphabet:
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dfa_func[letter] = None
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for let in FSA.alphabet:
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new_letter = None
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for state in new_dfa_state:
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nfa_letter = nfa[state][let]
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if nfa_letter:
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new_letter = ''.join(nfa_letter)
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if new_letter not in dfa_keys and new_letter not in new_states_list:
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new_states_list.append(new_letter)
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if not new_letter:
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new_letter = trap_state_in
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dfa_func[let] = new_letter
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dfa[new_dfa_state] = dfa_func
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self.transition_function = dfa
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def check_text(self, text):
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if self.is_nfa == 0:
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for letter in text:
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if letter not in self.alphabet:
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return 'NO'
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found_function = None
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for func in self.transition_function:
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if func['in'] == self.current_state and func['letter'] == letter:
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found_function = func
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if not found_function:
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return 'NO'
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self.current_state = found_function['out'][0]
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else:
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for letter in text:
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if letter not in self.alphabet:
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return 'NO'
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found_function = self.transition_function[self.current_state][letter]
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self.current_state = found_function
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if self.current_state in self.end_state:
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return 'YES'
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else:
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@ -68,8 +181,14 @@ for line in file:
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else:
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FSA.specify_end_state(line[0])
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for function in FSA.transition_function:
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if len(function['out']) > 1:
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FSA.is_nfa = 1
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FSA.nfa_to_dfa()
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break
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lines = ['']
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lines = ['xyz']
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for line in sys.stdin:
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line = line.rstrip('\n')
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