Question

When I print the group “print(a)” the entire group is shown. When I save it to a text file “open(“sirs1.txt”, “w”).write(a)” only the last row is saved to the file.

import re

def main():
f = open('sirs.txt')
for lines in f:
    match = re.search('(AA|BB|CC|DD)......', lines)
    if match:
        a = match.group()
        print(a)
        open("sirs1.txt", "w").write(a)

How do I save the entire group to the text file.

Answer 1

nosklo is correct the main problem is that you are overwriting the whole file each time you write to it. mehmattski is also correct in that you will also need to explicitly add \n to each write in order to make the output file readable.

Try this:

enter code here

import re

def main():
  f = open('sirs.txt') 
  outputfile = open('sirs1.txt','w')

  for lines in f:
    match = re.search('(AA|BB|CC|DD)......', lines)
    if match:
      a = match.group()
      print(a)
      outputfile.write(a+"\n")

  f.close()
  outputfile.close()