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[英]Python regex: removing all special characters and numbers NOT attached to words
[英]Removing words with special characters "\" and "/"
在推文分析过程中,我运行了包含 \\ 或 / 的“词”(在一个“词”中可能出现不止一次)。 我想完全删除这些词,但不能完全确定
这是我尝试过的:
sen = 'this is \re\store and b\\fre'
sen1 = 'this i\s /re/store and b//fre/'
slash_back = r'(?:[\w_]+\\[\w_]+)'
slash_fwd = r'(?:[\w_]+/+[\w_]+)'
slash_all = r'(?<!\S)[a-z-]+(?=[,.!?:;]?(?!\S))'
strt = re.sub(slash_back,"",sen)
strt1 = re.sub(slash_fwd,"",sen1)
strt2 = re.sub(slash_all,"",sen1)
print strt
print strt1
print strt2
我想得到:
this is and
this i\s and
this and
但是,我收到:
and
this i\s / and /
i\s /re/store b//fre/
添加:在这种情况下,“单词”是由空格或标点符号分隔的字符串(如常规文本)
这个怎么样? 我添加了一些标点符号示例:
import re
sen = r'this is \re\store and b\\fre'
sen1 = r'this i\s /re/store and b//fre/'
sen2 = r'this is \re\store, and b\\fre!'
sen3 = r'this i\s /re/store, and b//fre/!'
slash_back = r'\s*(?:[\w_]*\\(?:[\w_]*\\)*[\w_]*)'
slash_fwd = r'\s*(?:[\w_]*/(?:[\w_]*/)*[\w_]*)'
slash_all = r'\s*(?:[\w_]*[/\\](?:[\w_]*[/\\])*[\w_]*)'
strt = re.sub(slash_back,"",sen)
strt1 = re.sub(slash_fwd,"",sen1)
strt2 = re.sub(slash_all,"",sen1)
strt3 = re.sub(slash_back,"",sen2)
strt4 = re.sub(slash_fwd,"",sen3)
strt5 = re.sub(slash_all,"",sen3)
print(strt)
print(strt1)
print(strt2)
print(strt3)
print(strt4)
print(strt5)
输出:
this is and
this i\s and
this and
this is, and!
this i\s, and!
this, and!
不用re
就可以做到的一种方法是join
和理解。
sen = 'this is \re\store and b\\fre'
sen1 = 'this i\s /re/store and b//fre/'
remove_back = lambda s: ' '.join(i for i in s.split() if '\\' not in i)
remove_forward = lambda s: ' '.join(i for i in s.split() if '/' not in i)
>>> print(remove_back(sen))
this is and
>>> print(remove_forward(sen1))
this i\s and
>>> print(remove_back(remove_forward(sen1)))
this and
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