#!/usr/bin/env python3
def FetchSeqMulti(mydb, myrettype, myretmode, myid):
    from Bio import Entrez
    from Bio import SeqIO
    Entrez.email = "lb@laurentbloch.org"
    with Entrez.efetch(db=mydb, rettype=myrettype,\
                       retmode=myretmode, id=myid) as handle:
        for seq_record in SeqIO.parse(handle, "gb"):
            print("%s %s..." % (seq_record.id,\
                                seq_record.description[:50]))
            print("Sequence length %i, %i features, from: %s"
                  % (len(seq_record), len(seq_record.features),\
                     seq_record.annotations["source"]))

FetchSeqMulti("nucleotide", "gb", "text",\
              "6273291,6273290,6273289")