Gensim：类型错误：doc2bow 需要输入的 unicode 标记数组，而不是单个字符串

Question

我从一些 python 任务开始，我在使用 gensim 时遇到了一个问题。 我正在尝试从我的磁盘加载文件并处理它们（将它们拆分并小写（）它们）

我的代码如下：

dictionary_arr=[]
for file_path in glob.glob(os.path.join(path, '*.txt')):
    with open (file_path, "r") as myfile:
        text=myfile.read()
        for words in text.lower().split():
            dictionary_arr.append(words)
dictionary = corpora.Dictionary(dictionary_arr)

列表 (dictionary_arr) 包含所有文件中所有单词的列表，然后我使用 gensim corpora.Dictionary 来处理列表。 但是我面临一个错误。

TypeError: doc2bow expects an array of unicode tokens on input, not a single string

我不明白有什么问题，请提供一点指导，我们将不胜感激。

Answer 1

在dictionary.py中，初始化函数是：

def __init__(self, documents=None):
    self.token2id = {} # token -> tokenId
    self.id2token = {} # reverse mapping for token2id; only formed on request, to save memory
    self.dfs = {} # document frequencies: tokenId -> in how many documents this token appeared

    self.num_docs = 0 # number of documents processed
    self.num_pos = 0 # total number of corpus positions
    self.num_nnz = 0 # total number of non-zeroes in the BOW matrix

    if documents is not None:
        self.add_documents(documents)

函数 add_documents 从文档集合构建字典。 每个文档都是一个令牌列表：

def add_documents(self, documents):

    for docno, document in enumerate(documents):
        if docno % 10000 == 0:
            logger.info("adding document #%i to %s" % (docno, self))
        _ = self.doc2bow(document, allow_update=True) # ignore the result, here we only care about updating token ids
    logger.info("built %s from %i documents (total %i corpus positions)" %
                 (self, self.num_docs, self.num_pos))

所以，如果你以这种方式初始化 Dictionary ，你必须传递文档而不是单个文档。 例如，

dic = corpora.Dictionary([a.split()])

没问题。

Answer 2

字典的输入需要一个标记化的字符串：

dataset = ['driving car ',
           'drive car carefully',
           'student and university']

# be sure to split sentence before feed into Dictionary
dataset = [d.split() for d in dataset]

vocab = Dictionary(dataset)

Answer 3

大家好，我遇到了同样的问题。 这对我有用

    #Tokenize the sentence into words
    tokens = [word for word in sentence.split()]

    #Create dictionary
    dictionary = corpora.Dictionary([tokens])
    print(dictionary)