Entrez package from BioPython will help you to achieve your goal and also here is a full documentation of BioPython

example to get article Id about Polish

from Bio import Entrez
def search(query):
    Entrez.email = 'yourEmail@example.com'
    handle = Entrez.esearch(db='pubmed', 
                            sort='relevance', 
                            retmax='20',
                            retmode='xml', 
                            term=query)
    results = Entrez.read(handle)
    return results

my_id_list = search("poland")["IdList"]

Good luck.