Python - Extract text that starts with a particular sub-string

Question

I am working on extracting certain text from emails using Python Regex

I have tried below:

import re

email = """Hi John,

I am emailing regarding REQ-12345 and REQ-66442.

Many Thanks,

Jane"""


re.findall(r'(?=REQ-)',email)

Expected Output: ['REQ-12345', 'REQ-66442']

Actual Output: ['', '']

I have also tried multiple different things which aren't giving the right results.

How do I achieve the desired output?

Daweo · Accepted Answer · 2021-07-01 14:49:15Z

1

Expected Output: ['REQ-12345', 'REQ-66442']

Do not use zero-length assertion then (it is useful for grabing text after or before something without getting that thing), if REQ- is always followed by 1 or more digits (0123456789) following should suffice

import re
text = "I am emailing regarding REQ-12345 and REQ-66442."
print(re.findall(r'REQ-[0-9]+',text))

output

['REQ-12345', 'REQ-66442']

answered Jul 1, 2021 at 14:49

Daweo

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Epsi95 · Accepted Answer · 2021-07-01 14:47:40Z

0

import re

email = """Hi John,

I am emailing regarding REQ-12345 and REQ-66442.

Many Thanks,

Jane"""


re.findall(r'(REQ-\d+)',email)

['REQ-12345', 'REQ-66442']

answered Jul 1, 2021 at 14:47

Epsi95

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2 Comments

excelman Over a year ago

Thanks a ton. Working Exactly. :)

Epsi95 Over a year ago

@excelman Great, don't forget to accept the answer if it solves your problem, otherwise, it will keep coming up in the open question list.

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