Extract text between strings using regex

Question

I'm trying to extract from the text below the value next to number and the text in between.

Text:
The conditions are: number 1, the patient is allergic to dust, number next, the patient has bronchitis, number 4, The patient heart rate is high.

From this text I want to extract the following values:

1, the patient is allergic to dust,
next, the patient has bronchitis,
4, The patient heart rate is high

I have a pattern that allows me to get the value next to number and the first word of the sentence:

(numbers? (\d+|next)[,.]?\s?(\w+))

This is the result using re.findall

[('number 1, the', '1', 'the'),
 ('number next, the', 'next', 'the'),
 ('number 4, The', '4', 'The')]

As you can see, using groups I can extract the digit or next value from the text. But I have not been able to extract the entire sentence.

The fourth bird · Accepted Answer · 2022-07-08 20:08:05Z

2

As your . and , and the whitespace chars are optional after the digits or next, you might write the pattern with a non greedy dot asserting numbers again to the right or the end of the string.

\bnumbers? (\d+|next)[,.]?\s?(\w.*?)(?= numbers?\b|\.?$)

Regex demo

import re
 
pattern = r"\bnumbers? (\d+|next)[,.]?\s?(\w.*?)(?= numbers?\b|\.?$)"
 
s = "The conditions are: number 1, the patient is allergic to dust, number next, the patient has bronchitis, number 4, The patient heart rate is high."
 
print(re.findall(pattern, s))

Output

[
    ('1', 'the patient is allergic to dust,'),
    ('next', 'the patient has bronchitis,'),
    ('4', 'The patient heart rate is high')
]

edited Jul 8, 2022 at 20:08

answered Jul 8, 2022 at 19:42

The fourth bird

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Andrej Kesely · Accepted Answer · 2022-07-08 19:45:00Z

1

Try (regex101):

import re

s = "The conditions are: number 1, the patient is allergic to dust, number next, the patient has bronchitis, number 4, The patient heart rate is high."

pat = re.compile(r"numbers? (\d+|next)[,.]?\s?([^[,.]+)")

print(pat.findall(s))

Prints:

[
    ("1", "the patient is allergic to dust"),
    ("next", "the patient has bronchitis"),
    ("4", "The patient heart rate is high"),
]

answered Jul 8, 2022 at 19:45

Andrej Kesely

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