TypeError: unsupported format string passed to NoneType.format

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Traceback (most recent call last): File "C:/Users/Lenovo/PycharmProjects/untitled3/text6.py", line 49, in printGoodsList(infoList) 序号价格商品名称 File "C:/Users/Lenovo/PycharmProjects/untitled3/text6.py", line 34, in printGoodsList print(tplt.format(count, g[0], g[1])) 1 199.00