程序使用python从ncbi数据库中检索基因组

Question

import sys

from Bio import Entrez

# *Always* tell NCBI who you are
Entrez.email = "hiteshreelokhande@gmail.com"

def retrieve_annotation(id_list):

    """Annotates Entrez Gene IDs using Bio.Entrez, in particular epost (to
    submit the data to NCBI) and esummary to retrieve the information.
    Returns a list of dictionaries with the annotations."""

    request = Entrez.epost("gene",id=",".join(id_list))
    try:
        result = Entrez.read(request)
    except RuntimeError as e:
        #FIXME: How generate NAs instead of causing an error with invalid IDs?
        print ("An error occurred while retrieving the annotations.")
        print ("The error returned was %s" % e)
        sys.exit(-1)

    webEnv = result["WebEnv"]
    queryKey = result["QueryKey"]
    data = Entrez.esummary(db="gene", webenv=webEnv, query_key =
            queryKey)
    annotations = Entrez.read(data)

    print ("Retrieved %d annotations for %d genes" % (len(annotations),
            len(id_list)))

    return annotations

我用过这个程序，但是没有输出