tfidf.py 文件源码

def make_stack(series):
    stack_size = compute_stack_size(series)
    new = np.empty(stack_size, dtype=[('doc_index', np.uint), ('word', "S30"), ('value', np.float)])
    counter = 0
    for row in series.iteritems():
        for word in row[1]:
            new[counter] = (row[0], word, row[1][word])
            counter +=1
    return new