from Bio import Entrez
from Bio import SeqIO
Entrez.email = "trejomarco@test.edu"

file = open("humanSeq.txt")
sequences = open("humanSeq.fasta", "w")
l=[]
for line in file:
fields=line.split()
l.append(fields[0])
try:
    handle = Entrez.efetch(db="nucleotide", id=l, rettype="fasta", retmode="text")
    fasta_str = handle.read()
    handle.close()
    sequences.write(fasta_str)
except:
    continue
sequences.close()
file.close()

So in my fasta file I get the id for example: AY195771.1 Homo sapiens haplotype As2A mitochondrion, complete genome but I want to only have AY195771.1 and not the rest. Can anyone tell me to remove the extra information?