46 lines
1.5 KiB
Python
46 lines
1.5 KiB
Python
import pandas as pd
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import os
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import sys
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import random
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class Automat:
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def __init__(self, df: pd.DataFrame, end_states: list):
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self._df = df
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self._end_states = end_states
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def _consume_character(self, state: int, char: str):
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filter = (self._df[0] == state) & (self._df[2] == char)
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matching_rows = self._df[filter]
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if matching_rows.empty:
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return None
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end_states = matching_rows.iloc[:,1].tolist()
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return random.choice(end_states)
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def consume_word(self, word: str):
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prev_state = 0
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state = 0
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for char in word:
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prev_state = state
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state = self._consume_character(state, char)
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if state is None:
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return prev_state in self._end_states
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return state in self._end_states
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def create_automat_from_file(file_path: str):
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automat_df = pd.read_csv(file_path, sep=' ', header=None)
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end_states_condition = (automat_df[1].isnull()) & (automat_df[2].isnull())
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end_states_df = automat_df[end_states_condition]
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end_states = end_states_df.iloc[:,0].tolist()
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automat_df = automat_df[~end_states_condition]
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automat_df[2] = automat_df[2].astype(str)
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return Automat(automat_df, end_states)
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automat_path = os.path.join(os.path.dirname(__file__), 'test.arg')
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automat = create_automat_from_file(automat_path)
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txt = input('Write valid input: ')
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while txt != 'exit':
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print('YES' if automat.consume_word(txt) else 'NO')
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txt = input('Write valid input: ') |