正则表达式图释

本文介绍了正则表达式图释的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我将数据分成文件ID.我试图遍历每个fileid的数据，并搜索正则表达式定义的表情符号:(和:).如果找到了图释，我需要保留以下信息:a)找到了图释b)在此Fileid中.当我运行这段脚本并打印图释字典时，我得到的值是0.这怎么可能?我是初学者.

I have data split into fileids. I am trying to go through the data per fileid and search for emoticons :( and :) as defined by the regex. If an emoticon is found I need to retain the information a) the emoticon was found b) in this fileid. When I run this piece of script and print the emoticon dictionary I get 0 as a value. How is this possible? I am a beginner.

emoticon = 0
for fileid in corpus.fileids():
    m = re.search('^(:\(|:\))+$', fileid)
    if m is not None:
        emoticon +=1

推荐答案

在我看来，您的正则表达式正在运行，并且m的确不应该是None.

It looks to me like your regex is working, and that m should indeed not be None.

>>> re.search('^(:\(|:\))+$', ':)').group()
':)'
>>> re.search('^(:\(|:\))+$', ':)').group()
':)'
>>> re.search('^(:\(|:\))+$', ':):(').group()
':):('
>>> re.search('^(:\(|:\))+$', ':)?:(').group()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'NoneType' object has no attribute 'group'

但是，有些事情对我来说值得怀疑.

However, a few things are questionable to me.

这只会匹配100％表情符号的字符串
fileid确实是您要搜索的内容吗?

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