用Python实现图灵机
图灵机是计算理论中的经典模型,能够可靠地模拟任何计算机算法。本文将介绍如何用Python实现一个简单的图灵机。
首先,我们需要定义图灵机的状态。一个图灵机由状态、转移函数、输入、输出以及当前状态组成。我们可以用一个类来表示它:
class TuringMachine:
def __init__(self, states, input_alphabet, tape_alphabet, blank_symbol, transitions, initial_state, accepting_states, rejecting_states):
self.states = states
self.input_alphabet = input_alphabet
self.tape_alphabet = tape_alphabet
self.blank_symbol = blank_symbol
self.transitions = transitions
self.current_state = initial_state
self.accepting_states = accepting_states
self.rejecting_states = rejecting_states
self.tape = []
def run(self, input_str):
self.tape = lis