[英]Searching for a string within a strict format
I want to search for a sub-string using the python re library with the following format:我想使用 python re 库搜索具有以下格式的子字符串:
(some word)(\)term1(\)(some word) (some word)(\)term2(\)(some word)
The groups in brackets are optional, term1 and term2 must be in the string within that format.括号中的组是可选的,term1 和 term2 必须在该格式的字符串中。
A few examples of what it should detect:它应该检测的一些示例:
random sentence word\term1 term2 end of random sentence
random sentence term1 term2 end of random sentence
random sentence word\term1\word word\term2\word end of random sentence
so far i have tried this:到目前为止,我已经尝试过:
r'((\W+|^)term1((\W))*)(\w+|) (\w+|)(\W|)term2(\W|)'
but it does not work但它不起作用
This pattern should work:这种模式应该有效:
^[\w ]*\\?term1\\?[\w ]*\\?term2\\?[\w ]*$
Python demo: Python 演示:
import re
pattern = re.compile(r"^[\w ]*\\?term1\\?[\w ]*\\?term2\\?[\w ]*$")
string1 = r"random sentence word\term1 term2"
string2 = r"random sentence term1 term2 end of random sentence"
string3 = r"random sentence word\term1\word word\term2\word end of random sentence"
print(bool(re.search(pattern, string1)))
print(bool(re.search(pattern, string2)))
print(bool(re.search(pattern, string3)))
Output:
Output:
True True True
Use the following:使用以下内容:
^.*\s(?:\w+\\)?term1(?:\\\w+)?\s(?:\w+\\)?term2(?:\\\w+)?\s.*$
import re
lines = [
r'random sentence word\term1 term2 end of random sentence',
r'random sentence term1 term2 end of random sentence',
r'random sentence word\term1\word word\term2\word end of random sentence'
]
regex = re.compile(r'(\b\w+\b)?\\?term1\\?(\b\w+\b)? (\b\w+\b)?\\?term2\\?(\b\w+\b)?')
for line in lines:
m = regex.search(line)
if m:
print('Match:', m.group(0))
else:
print("No match")
Prints:印刷:
Match: word\term1 term2
Match: term1 term2
Match: word\term1\word word\term2\word
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