Rename and improve functionality on fetch data

#!/usr/bin/python3

# Fetching the required data for testing

# a. entrez NCBI fasta test file

# b. a primer data file

from Bio import Entrez

Entrez.email = 'unknown@debian.org'

database = 'nucleotide'

fn = 'data/gingo.fasta'

query = [

    '((chloroplast OR plastid) AND "complete genome" AND Embryophyta NOT (mi- tochondrion OR mitochondrial)) AND "Ginkgo biloba"'

]

primer = "rbcL1/rbcLA\t TTGGCAGCATTYCGAGTAACTCC\t CCTTTRTAACGATCAAGRC"

def fetch_ids(dbs, qr):

    # Fetch the query IDs

    print(dbs, qr)

    handle = Entrez.esearch(db=dbs, term=qr)

    record = Entrez.read(handle)

    ids = record['IdList']

    handle.close()

    # Fetch the first result

    ff = open(fn, 'w')

    handle_fasta = Entrez.efetch(

        db=dbs, id=ids[0], rettype='fasta', retmode='text')

    ff.write(handle_fasta.read().rstrip('\n'))

    handle_fasta.close()

def create_primer(pr):

    pf = open('rbcL-primer.txt', 'w')

    pf.write(pr)

    pf.write('\n')

    pf.close()

fetch_ids(database, query)

create_primer(primer)