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我有一个使用马尔可夫链生成句子的 Python 代码，但对于代码工作，我必须定义 2 个起始词，但我希望第一个词是随机选择的。

这是代码：

import random

def getLines(filename):
 return [line[0:-1] for line in open(filename).readlines()]

def getWords(lines):
 words = []
 for line in lines:
  words.extend(line.split())
 return words

def createProbabilityHash(words):
 numWords = len(words)
 wordCount = {}
 for word in words:
  if wordCount.has_key(word):
   wordCount[word] += 1
  else:
   wordCount[word] = 1

 for word in wordCount.keys():
  wordCount[word] /= 1.0 * numWords
 return wordCount

def getRandomWord(wordCount):
 randomValue = random.random()
 cumulative = 0.0
 choosenWord = ""
 print wordCount
 for word in wordCount:
  probability = wordCount[word]
  if probability > cumulative:
      cumulative = probability
      choosenWord = word

 return choosenWord


words = getWords(getLines("frases.txt"))
wordMap = {}
previous = (words[0], words[1])
for word in words[2:]:
 if wordMap.has_key(previous):
  wordMap[previous].append(word)
 else:
  wordMap[previous] = [word]
 previous = (previous[1], word)

for word in wordMap.keys():
 probabilityHash = createProbabilityHash(wordMap[word])

 wordMap[word] = probabilityHash

palavras = ['hello', 'apple', 'something', 'yeah', 'nope', 'lalala']
previous = (".", "A") #Starting words
numWords = 10 # The number of words to print

print previous[0], previous[1],
for i in range(numWords):
 word = getRandomWord(wordMap[previous])
 print word,
 if word.endswith(","):
  print "\n"
 if word.endswith("."):
  break

 previous = (previous[1], word)
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1 回答 1

0

这将从字典中的单词中随机选择：

import random
previous[0] = random.choice(wordMap.keys())
于 2013-06-11T21:32:02.910 回答