lab2

lab2/programm/finite_automaton.py

@@ -0,0 +1,63 @@
+import random
+
+
+class FiniteAutomaton:
+    def __init__(
+        self,
+        transitions: dict[str, list[tuple[str, str]]],
+        initial_state: str,
+        final_states: set[str],
+        alphabet: set[str],
+    ):
+        self.transitions = transitions
+        self.initial_state = initial_state
+        self.final_states = final_states
+        self.alphabet = alphabet
+
+    def _get_next_state(self, current_state: str, char: str) -> str | None:
+        if current_state in self.transitions:
+            for transition, next_state in self.transitions[current_state]:
+                if char in transition:
+                    return next_state
+        return None
+
+    def process_input(self, input_string: str) -> tuple[str, list[str]]:
+        current_state = self.initial_state
+        transitions_path = [current_state]
+
+        for char in input_string:
+            if char not in self.alphabet:
+                return f"Символ '{char}' не из алфавита", transitions_path
+
+            next_state = self._get_next_state(current_state, char)
+
+            if next_state is None:
+                return "Строка не соответствует", transitions_path
+
+            transitions_path.append(next_state)
+            current_state = next_state
+
+        return (
+            "Строка соответствует"
+            if current_state in self.final_states
+            else "Строка не соответствует"
+        ), transitions_path
+
+    def generate_random_string(self, stop_probability: float = 0.3) -> str:
+        result = []
+        current_state = self.initial_state
+
+        while True:
+            if (
+                current_state in self.final_states
+                and random.random() < stop_probability
+            ):
+                break
+
+            transition, next_state = random.choice(self.transitions[current_state])
+
+            char = random.choice(transition)
+            result.append(char)
+            current_state = next_state
+
+        return "".join(result)