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# vul de type hinting zelf aan.
def aantal_winkels_in_postcode(bestandsnaam, postcode):
# TO DO
return 0
# Zorg dat het bestand "koop-lokaal-winkels.csv" in dezelfde map staat als dit .py bestand.
# Zet onderstaande regel uit commentaar om lokaal te testen
# print(aantal_winkels_in_postcode("koop-lokaal-winkels.csv", 9040))