Question

我的文字为Hi, my name is Will, And i am from Canada. I have 2 pets. One is a dog and the other is a Zebra. Ahoi! Thanks.

我想从.和'！'中拆分这句话，我该怎么做呢。我也想知道句子分裂的特征。

例如，结果应为：

示例1：

Hi, my name is Will, And i am from Canada || The sentence was split with .

示例2：

Ahoi! || The sentence was split with !

我该怎么做？我到目前为止的工作：

print (text.split('.')) - 这只会打破.的句子，我无法确定它用于分割的字符。

Answer 1

您可以使用re.split()：

re.split('[.!]', text)

这会分割[...]字符类中的任何字符：

>>> import re
>>> text = 'Hi, my name is Will, And i am from Canada. I have 2 pets. One is a dog and the other is a Zebra. Ahoi! Thanks.'
>>> re.split('[.!]', text)
['Hi, my name is Will, And i am from Canada', ' I have 2 pets', ' One is a dog and the other is a Zebra', ' Ahoi', ' Thanks', '']

您可以对拆分表达式进行分组，以将字符包含在输出中的单独列表元素中：

>>> re.split('([.!])', text)
['Hi, my name is Will, And i am from Canada', '.', ' I have 2 pets', '.', ' One is a dog and the other is a Zebra', '.', ' Ahoi', '!', ' Thanks', '.', '']

要将标点符号附加到句子上，请改为使用re.findall()：

>>> re.findall('[^.!]+?[.!]', text)
['Hi, my name is Will, And i am from Canada.', ' I have 2 pets.', ' One is a dog and the other is a Zebra.', ' Ahoi!', ' Thanks.']

Answer 2

>>> sp=re.split('(\.)|(!)','aaa.bbb!ccc!ddd.eee')
>>> sp
['aaa', '.', None, 'bbb', None, '!', 'ccc', None, '!', 'ddd', '.', None, 'eee']
>>> sp[::3] # the result
['aaa', 'bbb', 'ccc', 'ddd', 'eee']
>>> sp[1::3] # where matches `.`
['.', None, None, '.']
>>> sp[2::3] # where matches `!`
[None, '!', '!', None]

使用预定义字符分隔字符串

2 个答案: