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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def has_receipt(item):
 """ Verify if a item has a receipt. """

    pronac_id = str(item['idPronac'])
    item_id = str(item["idPlanilhaItens"])

    combined_id = f'{pronac_id}/{item_id}'

    return combined_id in data.receipt.index