python nltk中的功能"bigrams"不起作用 [英] The function 'bigrams' in python nltk not working

问题描述

来自nltk的bigrams函数返回以下消息，

The function bigrams from nltk is returning the following message,

即使已导入nltk，并且其他功能正在运行.有任何想法吗?谢谢.

even though nltk is imported and other functions from it are working. Any ideas? Thanks.

>>> import nltk
>>> nltk.download()
showing info http://www.nltk.org/nltk_data/
True
>>> from nltk import bigrams
>>> bigrams(['more', 'is', 'said', 'than', 'done'])
<generator object bigrams at 0x0000000002E64240>

推荐答案

函数bigrams返回了发电机"对象；这是一种Python数据类型，类似于List，但仅在需要时创建其元素.如果要将生成器实现为列表，则需要将其显式转换为列表:

The function bigrams has returned a "generator" object; this is a Python data type which is like a List but which only creates its elements as they are needed. If you want to realise a generator as a list, you need to explicitly cast it as a list:

>>> list(bigrams(['more', 'is', 'said', 'than', 'done']))
[('more', 'is'), ('is', 'said'), ('said', 'than'), ('than', 'done')]

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