小编Rok*_*pta的帖子

import nltk
import random
from nltk.corpus import movie_reviews

documents=[(list(movie_reviews.words(fileid)),category)
           for category in movie_reviews.categories()
           for fileid in movie_reviews.fileids(category)]

random.shuffle(documents)
#print(documents[1])

all_words=[]

for w in movie_reviews.words():
    all_words.append(w.lower())

all_words=nltk.FreqDist(all_words)

word_features = list(all_words.keys())[:3000]

def find_features(document):
    words = set(document)
    features=[]
    for w in word_features:
        features[w]= (w in words)

    return features

print((find_features(movie_reviews.words('neg/cv000_29416.txt'))))

featuresets = [(find_features(rev), category) for (rev,category) in documents]

运行后,我收到错误

features[w]= (w in words)
TypeError: list indices must be integers, not str

请帮我解决一下......

我正在尝试在我安装的 ubuntu 服务器中将 pdf 文件转换为图像文件：

1. 蟒蛇2.7
2. poppler 工具
3. pdf2image==1.12.1

我的代码：

from pdf2image import convert_from_path, convert_from_bytes

images = convert_from_path("/home/user/pdf_file.pdf")

# OR

with open("/home/user/pdf_file.pdf") as pdf:
    images = convert_from_bytes(pdf.read())

输出

当我使用函数“convert_from_path”时

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python2.7/dist-packages/pdf2image/pdf2image.py", line 143, in convert_from_path
    thread_output_file = next(output_file)
TypeError: ThreadSafeGenerator object is not an iterator

当我使用函数“convert_from_bytes”时

Traceback (most recent call last):
  File "<stdin>", line 2, in <module>
  File "/usr/local/lib/python2.7/dist-packages/pdf2image/pdf2image.py", line 268, in convert_from_bytes
    paths_only=paths_only,
  File "/usr/local/lib/python2.7/dist-packages/pdf2image/pdf2image.py", line 143, in …

最常用的单词列表输出如下：

[('电影', 904), ('电影', 561), ('one', 379), ('like', 292)]

我想要一个根据数字对每个单词使用 matplotlib 的图形

请帮我