CODEWITHSUNDEEP
python
alphanumeric
alphanumeric

Reputation: 19349

How to extract numbers from string separated with minus sign

I need to be able to extract two numbers from a string. I know those two numbers (if presented in a string) are separated from each other with '-' character.

a='some text'
b='some 0-376 text'
c='some text.0-376.some text again'
d='some text.0-376####.jpg'

Apparently I need to extract zero 0 and 376 in simple but reliable fashion. So the code works regardless where in a string the numbers are places: in the beginning, middle or the end. It should be delivering a constant result regardless what characters are around the number: letter, commas, periods, dollar or pound signs and etc.

Upvotes: 1

Views: 325

Answers (2)

isedev
isedev

Reputation: 19641

You can achieve the desired using a regular expression:

import re
regex = re.compile('([0-9]+)-([0-9]+)')
match = regex.search('some text.0-376.some text again')
if match:
    numbers = [int(s) for s in match.groups()]
    # numbers -> [0, 376]

Upvotes: 1

Robᵩ
Robᵩ

Reputation: 168726

This sounds like a job for regular expressions:

import re

a='some text'
b='some 0-376 text'
c='some text.0-376.some text again'
d='some text.0-376####.jpg'


for text in a, b, c, d:
    match = re.search(r'(\d+)-(\d+)', text)
    if match:
      left, right = map(int, match.groups())
      print left, right

Upvotes: 2

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