gistfile1.py

import re
pattern=re.compile(r'[^1-9 ]')

ids = []
with open('abstractids.txt','r') as f:
    for line in f:
        line = pattern.sub('',line)
        ids.append(line)
with open('abstractsfinal.txt','r') as f:
    i = 0
    for line in f:
        title = './abstracts/'+ids[i]+'.txt'
        with open(title,'w') as f1:
            f1.write(line)
        print i
        i += 1