Question

O In 'market basket.txt' file, there are lots of items in baskets. 1 line means 1 basket each. Every item is delimited with comma write items in a new file 'items.txt [result) O Find all items without duplication. Display the number of items, and [run] items.txt-메모장 파일(F) 편집(E) 서식(0) itrus fruit emi-finished bread he number of items IS 4 보기 도움말(H) rgar ine eady soups ropical fruit urt offee ole milk ip fruit ream cheese at spreads ther vegetables densed mi lk long life bakery product O Tip : Use str.replace0 function tter 1 се brasive cleaner

please us python3. Thanks.

Answer 1

def main():
    try:
        with open("market basket.txt", "r") as f, open("items.txt", "w") as w:
            items_list = []
            for basket in f:
                basket = basket.replace("\n", "").replace("\r", "")
                for item_in_basket in basket.split(","):
                    item_in_basket = item_in_basket.lower()
                    if item_in_basket not in items_list:
                        items_list.append(item_in_basket)
            for item_in_list in items_list:
                w.write(item_in_list + "\n")

            print("The number of items is " + str(len(items_list)) + ".")
    except FileNotFoundError:
        print("market basket.txt does not exist!")


main()