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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 find_perf_space_price(package, size):
 """Find the price in the given package with the specified size :param package: The Performance product package :param size: The storage space size for which a price is desired :return: Returns the price for the given size, or an error if not found """

    for item in package['items']:
        if int(item['capacity']) != size:
            continue

        price_id = _find_price_id(item['prices'], 'performance_storage_space')
        if price_id:
            return price_id

    raise ValueError("Could not find performance space price for this volume")