ValueError: Wrong number of items passed 2, placement implies 1

在windows中运行正常，linux中报错

ValueError: Wrong number of items passed 2, placement implies 1。

可能是由于版本不对，

解决：

 attr['Package'] = attr[['Width','Length']].apply(lambda x: str(x['Width'] +'X'+x['Length']), axis=1)改为：attr['Package'] = attr['Width'] +'X'+attr['Length']

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