text: #!/usr/bin/env python3
  """
  Clean IMGT germline fasta files for IgBLAST database build
  """
  import Bio
  from pkg_resources import parse_version
  from sys import argv
  from Bio import SeqIO
  from Bio.SeqRecord import SeqRecord
  
  # Get input and output file names
  in_file = argv[1]
  out_file = argv[2]
  
  # Load sequences into memory and process them
  name_set = set()
  seq_list = list()
  for rec in SeqIO.parse(in_file, 'fasta'):
      name = rec.description.split('|')[1]
      if name not in name_set:
          name_set.add(name)
          seq = SeqRecord(rec.seq.ungap('.').upper(), id=name, name=name, description=name)
          seq_list.append(seq)
  
  # Overwrite file
  with open(out_file, 'w') as out_handle:
      if parse_version(Bio.__version__) >= parse_version('1.71'):
          # Biopython >= v1.71
          SeqIO.write(seq_list, out_handle, format='fasta-2line')
      else:
          # Biopython < v1.71
          writer = SeqIO.FastaIO.FastaWriter(out_handle, wrap=None)
          writer.write_file(seq_list)
  