extracting numbers from list of strings with python

Question

I have a list of strings that I am trying to parse for data that is meaningful to me. I need an ID number that is contained within the string. Sometimes it might be two or even

Answer 1

Based on @alecxe solution you can also do it without any imports.

If your id numbers are always after id and have a fixed (7) number of digits I would probably just use .split('id ') to separate it and get the 7 digits from the second block onwards.

You can put them together in the desired format by using '; '.join()

Putting everything together:

pattern = ['; '.join([value[:7] for value in valueList.split('id ')[1:]]) for valueList in lst1]

Which prints out:

['3999595; 3999999', '3998895; 5555456; 3998899']