How to get accession number on NCBI and how to get their gene sequences?

Hi, everyone! I’m new to this world and im getting acquainted to Biopython..

On NCBI I did >> specie 1(organism) OR specie2(organism) OR specie3(organism) OR.. AND (gene1 OR gene2)
Which from that i donwloaded the accession numbers to a “accesslist”

I think i couldve also done this but it wouldve been to many names (i have about 700 species)

from Bio import Entrez

Entrez.email  = "myname@gmail.com"
search_term  = "specie1[Orgn] AND gene1[gene]" 
handle       = Entrez.esearch(db="nucleotide", term=search_term, idtype="acc")        
record       = Entrez.read(handle)
idlist       = record['IdList']
print(idlist)

(I also dont know how to donwload a txt file with the accession list this way)

But then supposing I have the list with all the accession numbers how do i retrieve their sequences from the gene i specified??