sf = Salesforce(username=username, password=password, security_token=security_token, sandbox=False)

records = sf.query("SELECT Id, Name,C_digo_del_Usuario__c,Tratamiento_IPA__c,Estado__c,Municipio__c,Comunidad__c, URL_Fotograf_a_Cliente__c FROM Contact WHERE Tratamiento_IPA__c IN ('x', 'y', 'z')")
for r in records.get("records"):
    url = record["URL_Fotograf_a_Cliente__c"]
    # Now, download the image and save it.
    # other record details are available as, e.g., `record["Name"]`