Question

我想从段落中删除某些单词，例如“and”，“as”和“like”。是否有更简单的方法从字符串中删除单词而不是通过替换 -

new_str = str.replace(' and ', '').replace(' as ', '').replace(' like ', '')

例如，是否有类似以下的方法？

str.remove([' and ', ' like ', ' as '])

Answer 1

是的，您可以使用sub模块中的re功能：

>>> import re
>>> s = 'I like this as much as that'
>>> re.sub('and|as|like', '', s)
'I  this  much  that'

Answer 2

您可以使用正则表达式：

    >>> import re
    >>> test = "I like many words but replace some occasionally"
    >>> to_substitute = "many|words|occasionally"
    >>> re.sub(to_substitute, '', test)
    'I like   but replace some '

Answer 3

你也可以没有正则表达式。请参阅以下示例

def StringRemove(st,lst):
    return ' '.join(x for x in st.split(' ') if x not in lst)

>>> StringRemove("Python string Java is immutable, unlike C or C++ that would give you a performance benefit. So you can't change them in-place",['like', 'as', 'and'])
"Python string Java is immutable, unlike C or C++ that would give you a performance benefit. So you can't change them in-place"

>>> st="Python string Java is immutable,     unlike C or C++ that would  give you a performance benefit. So you can't change them in-place"
>>> StringRemove(st,['like', 'as', 'and'])==st
True
>>>

Answer 4

请注意，如果你关心的只是可读性而不是性能，你可以这样做：

new_str = str
for word_to_remove in [' and ', ' as ', ' like ']:
    new_str = new_str.replace(word_to_remove, '')

替代Python字符串替换方法

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