I want to capture the digits that follow a certain phrase and also the start and end index of the number of interest.
Here is an example:
text = The special code is 034567 in this particular case and not 98675
In this example, I am interested in capturing the number 034657
which comes after the phrase special code
and also the start and end index of the the number 034657
.
My code is:
p = re.compile('special code \s\w.\s (\d+)')
re.search(p, text)
But this does not match anything. Could you explain why and how I should correct it?
Use re.findall
with a capture group:
text = "The special code is 034567 in this particular case and not 98675"
matches = re.findall(r'\bspecial code (?:\S+\s+)?(\d+)', text)
print(matches)
This prints:
['034567']
Your expression matches a space and any whitespace with \s
pattern, then \w.
matches any word char and any character other than a line break char, and then again \s
requires two whitespaces, any whitespace and a space.
You may simply match any 1+ whitespaces using \s+
between words, and to match any chunk of non-whitespaces, instead of \w.
, you may use \S+
.
Use
import re
text = 'The special code is 034567 in this particular case and not 98675'
p = re.compile(r'special code\s+\S+\s+(\d+)')
m = p.search(text)
if m:
print(m.group(1)) # 034567
print(m.span(1)) # (20, 26)
See the Python demo and the regex demo .
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