code: def getSequence(title, db='nucleotide'):
      
      titleId = title.split(' ', 1)[0]
      try:
          gi = titleId.split('|')[1]
      except IndexError:
          # Assume we have a gi number directly, and make sure it's a string.
          gi = str(titleId)
  
      try:
          client = Entrez.efetch(db=db, rettype='gb', retmode='text', id=gi)
      except URLError:
          return None
      else:
          record = SeqIO.read(client, 'gb')
          client.close()
          return record
docs: Get information about a sequence from Genbank.
  
      @param title: A C{str} sequence title from a BLAST hit. Of the form
          'gi|63148399|gb|DQ011818.1| Description...'.
      @param db: The C{str} name of the Entrez database to consult.
  
      NOTE: this uses the network!  Also, there is a 3 requests/second limit
      imposed by NCBI on these requests so be careful or your IP will be banned.