Play hangman on the command line

hangman.py

from collections import defaultdict
from os import system

def clear():
	_ = system('clear')

class Hangman:
	def __init__(self):
		self.word = input("Enter the word to guess: ").lower()
		
		if not self.word.isalpha():
			raise Error("The word should have only alphabets")

		self.word_indices = defaultdict(set)
		for i in range(len(self.word)):
			self.word_indices[self.word[i]].add(i)

		self.tries_left = int(input("Enter the number of tries: "))
		if self.tries_left < 1:
			raise Error("The player should have at least one try")

		self.correct_guesses = 0
		self.curr_state = [ '-' for i in range(0, len(self.word)) ]
		clear()
		print("Game initialized. Let's play Hangman!")


	def guess(self, guessed_alphabet):
		matched_indices = self.word_indices[guessed_alphabet]
		matched_count = len(matched_indices)

		self.correct_guesses += matched_count
		if matched_count == 0:
			self.tries_left -= 1

		for i in matched_indices:
			self.curr_state[i] = guessed_alphabet

		return matched_count > 0


	def get_curr_state(self):
		return " ".join(self.curr_state)


	def run(self):
		while self.tries_left > 0 and self.correct_guesses < len(self.word):
			print()
			print("You have ", self.tries_left, " tries left")
			print("The word is ", self.get_curr_state())
			guessed_alphabet = input("Guess an alphabet: ")
			if self.guess(guessed_alphabet):
				print("Yay, it was a hit")
			else:
				print("Oh no! it was a miss.")
		if self.correct_guesses == len(self.word):
			print("You win!")
		else:
			print("You loose!")
		print("Game over.")


Hangman().run()