Python：如何从列表中的句子元素制作多个字符串子列表？

Question

所以这是我的第一个列表：

listone = [
           'Every day Miss Leeson went out to work', 
           ' At night she brought home papers with handwriting on them and made copies with her typewriter', 
           ' Sometimes she had no work at night, and then she would sit on the steps of the high stoop with the other roomers', 
           ' Miss Leeson was not intended for a sky-light room when the plans were drawn for her creation', 
           ' She was gay-hearted and full of tender, whimsical fancies', 
           ' Once she let Mr', 
           ' Skidder read to her three acts of his great (unpublished) comedy, "It'
          ]

在这个列表中，每个句子都是一个元素，我想让每个句子成为一个子列表，或者只有句子的一部分成为一个子列表，例如：

listtwo = [['Every','Miss','work'], ['At', 'she', 'with'] etc.]

子列表中的单词是随机选择的，我已经有一个过滤功能可以使用。

感谢您的帮助！

Answer 1

你也可以使用map函数：

>>> map(str.split, listone)
[['Every', 'day', 'Miss', 'Leeson', 'went', 'out', 'to', 'work'], ['At', 'night', 'she', 'brought', 'home', 'papers', 'with', 'handwriting', 'on', 'them', 'and', 'made', 'copies', 'with', 'her', 'typewriter'], ['Sometimes', 'she', 'had', 'no', 'work', 'at', 'night,', 'and', 'then', 'she', 'would', 'sit', 'on', 'the', 'steps', 'of', 'the', 'high', 'stoop', 'with', 'the', 'other', 'roomers'], ['Miss', 'Leeson', 'was', 'not', 'intended', 'for', 'a', 'sky-light', 'room', 'when', 'the', 'plans', 'were', 'drawn', 'for', 'her', 'creation'], ['She', 'was', 'gay-hearted', 'and', 'full', 'of', 'tender,', 'whimsical', 'fancies'], ['Once', 'she', 'let', 'Mr'], ['Skidder', 'read', 'to', 'her', 'three', 'acts', 'of', 'his', 'great', '(unpublished)', 'comedy,', '"It']]

并将其与您的过滤函数链接（在这种情况下，选择 3 个随机单词）

>>> import random
>>> map(lambda x: random.sample(x, 3), map(str.split, listone))
[['Every','Miss','work'], ['At', 'she', 'with'] etc.]

（或者，使用列表理解：）

>>> [random.sample(x.split(), 3) for x in listone]

Answer 2

您可以使用split 的列表推导来分解句子

>>> [i.split() for i in listone]
[['Every', 'day', 'Miss', 'Leeson', 'went', 'out', 'to', 'work'],
 ['At', 'night', 'she', 'brought', 'home', 'papers', 'with', 'handwriting', 'on', 'them', 'and', 'made', 'copies', 'with', 'her', 'typewriter'],
 ['Sometimes', 'she', 'had', 'no', 'work', 'at', 'night,', 'and', 'then', 'she', 'would', 'sit', 'on', 'the', 'steps', 'of', 'the', 'high', 'stoop', 'with', 'the', 'other', 'roomers'],
 ['Miss', 'Leeson', 'was', 'not', 'intended', 'for', 'a', 'sky-light', 'room', 'when', 'the', 'plans', 'were', 'drawn', 'for', 'her', 'creation'],
 ['She', 'was', 'gay-hearted', 'and', 'full', 'of', 'tender,', 'whimsical', 'fancies'],
 ['Once', 'she', 'let', 'Mr'],
 ['Skidder', 'read', 'to', 'her', 'three', 'acts', 'of', 'his', 'great', '(unpublished)', 'comedy,', '"It']]

您还可以在列表推导中使用filter 来应用您的过滤功能来删除不需要的单词。

Answer 3

如果你想从每个句子中随机抽取 3 个：

 def get_random(a):
     return random.sample(a,3)
 [ get_random(x.split()) for x in listone ]
 '''or using map function'''
 map(get_random,map(str.split,listone))

输出：

[['to', 'went', 'out'], ['on', 'At', 'with'], ['she', 'and', 'would'], ['her', 'room', 'were'], ['tender,', 'was', 'full'], ['Mr', 'let', 'Once'], ['Skidder', 'her', '(unpublished)']]