python3.6 KeyError: 'Called' 问题。

m0_38101400 2018-01-25 03:26:57

python 3.6 报错，百度不清楚问题。



from random import randint

from urllib.request import urlopen





def wordListSum(word_list):

    sum_int = 0

    for word, value in word_list:

        sum_int += value

    return sum_int





def retrieveRandomWord(wordList):

    rand_index = randint(1, wordListSum(wordList))

    for word, value in wordList:

        rand_index -= value

        if rand_index <= 0:

            return word





def buildWordDict(text_str):

    # 剔除换行号和引号

    text_str = text_str.replace("\n", " ")

    text_str = text_str.replace("\"", "")



    punctuation = [',', '.', ';', ':']

    for symbol in punctuation:

        text_str = text_str.replace(symbol, " " + symbol + " ")



    words = text_str.split(" ")

    # 过滤空单词

    words = [word for word in words if word != ""]

    word_dicts = {}

    for no in range(1, len(words)):

        if words[no - 1] not in word_dicts[words[no - 1]]:

            word_dicts[words[no - 1]][words[no]] = 0

        word_dicts[words[no - 1]][words[no]] += 1

    return word_dicts





text = str(urlopen("http://pythonscraping.com/files/inaugurationSpeech.txt"

                   "").read(), 'utf-8')

word_dict = buildWordDict(text)



# 生成链长为100的马尔科夫链

length = 100

chain = ""

currentWord = "I"

for i in range(0, length):

    chain += currentWord + " "

    currentWord = retrieveRandomWord(word_dict[currentWord])



print(chain)

报错

Traceback (most recent call last):

  File "D:/gitDocument/document/WebScrapingWithPython/markovChain.py", line 42, in <module>

    word_dict = buildWordDict(text)

  File "D:/gitDocument/document/WebScrapingWithPython/markovChain.py", line 34, in buildWordDict

    if words[no - 1] not in word_dicts[words[no - 1]]:

KeyError: 'Called'

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