Which regular expression do I have to implement to extract text between two lines containing a string and an arbitrary number of digits?

Question

That’s the code I have:

text = 'LIBRO 1ndsfsdfnasdasnfgfghfnLIBRO 21nhghjnghjhjknghjhknLIBRO 333'

result = re.findall(r'(?<=LIBRO d+n)(.*?)(?=nLIBRO)', text, re.DOTALL)
print(result)

and this is the error I get:

re.error: look-behind requires fixed-width pattern

the desired result is:

['dsfsdfnasdasnfgfghf', 'nhghjnghjhjknghjhk']

Asked By: Manuel Zompetta

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Source

Answer 1

You could use split instead of findall, removing the empty entries in the results, as there would be a result for what comes before the first LIBRO:

result = [s.strip() for s in re.split(r'(?m)^LIBRO d+$', text) if s]

Answered By: trincot

Which regular expression do I have to implement to extract text between two lines containing a string and an arbitrary number of digits?

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