Python正则表达式匹配特定单词 [英] Python regex to match a specific word

问题描述

我想匹配测试报告中的所有行，其中包含单词不好". 文字示例:

I want to match all lines in a test report, which contain words 'Not Ok'. Example line of text :

'Test result 1: Not Ok -31.08'

我尝试过:

filter1 = re.compile("Not Ok")
for line in myfile:                                     
    if filter1.match(line): 
       print line

应该可以根据 http://rubular.com/进行工作，但输出没有任何结果.任何想法，可能有什么问题吗?测试了其他各种参数，例如.".和"^ Test"，它们可以完美地工作.

which should work according to http://rubular.com/, but I get nothing at the output. Any idea, what might be wrong? Tested various other parameters, like "." and "^Test" , which work perfectly.

推荐答案

您应在此处使用re.search而不是re.match.

You should use re.search here not re.match.

来自re.match上的文档:

如果要在字符串中的任意位置找到匹配项，请改用search().

If you want to locate a match anywhere in string, use search() instead.

如果您要查找确切的单词'Not Ok'，请使用\b单词边界，否则 如果您只是在寻找'Not Ok'子字符串，请使用simple:if 'Not Ok' in string.

If you're looking for the exact word 'Not Ok' then use \b word boundaries, otherwise if you're only looking for a substring 'Not Ok' then use simple : if 'Not Ok' in string.

>>> strs = 'Test result 1: Not Ok -31.08'
>>> re.search(r'\bNot Ok\b',strs).group(0)
'Not Ok'
>>> match = re.search(r'\bNot Ok\b',strs)
>>> if match:
...     print "Found"
... else:
...     print "Not Found"
...     
Found

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