Sequence 1.1.1  ATGCGCGCGATAAGGCGCTA
      ATATTATAGCGCGCGCGCGGATATATATATATATATATATT
  Sequence 1.2.2  ATATGCGCGCGCGCGCGGCG
      ACCCCGCGCGCGCGCGGCGCGATATATATATATATATATATT
  Sequence 2.1.1  ATTCGCGCGAGTATAGCGGCG

NOW,I would like to remove the last digit from each of the line that starts with '>'. For example, in this first line, i would like to remove '.1' (rightmost) and in second instance i would like to remove '.2' and then write the rest of the file to a new file. Thanks,
map "".join(line.split('.')[:-1]) to each line of the file.
How to eliminate last digit from each of the top lines