我有一个列表,里面有几个空列表。我按照这里的指示(Python: How to remove empty lists from a list?)尝试过滤空列表,但是失败了,我真的没有理由。在
我的列表:
data: [['#0721', '', '', '', ''], ['', '', '', '', ''], ['', '', '', '', ''], ['GBE COD', '746', '$2.00', '', '$1,492.00'], ['GBW COD', '13,894', '$0.50', '', '$6,947.00'], ['GOM COD', '60', '$2.00', '', '$120.00'], ['GB WINTER FLOUNDER', '94,158', '$0.25', '', '$23,539.50'], ['GOM WINTER FLOUNDER', '3,030', '$0.50', '', '$1,515.00'], ['GBE HADDOCK', '18,479', '$0.02', '', '$369.58'], ['GOM HADDOCK', '0', '$0.02', '', '$0.00'], ['GBW HADDOCK', '110,470', '$0.02', '', '$2,209.40'], ['HAKE', '259', '$1.30', '', '$336.70'], ['PLAICE', '3,738', '$0.40', '', '$1,495.20'], ['POLLOCK', '3,265', '$0.02', '', '$65.30'], ['WITCH FLOUNDER', '1,134', '$1.30', '', '$1,474.20'], ['SNE YT', '1,458', '$0.65', '', '$947.70'], ['GB YT', '4,499', '$0.70', '', '$3,149.30'], ['REDFISH', '841', '$0.02', '', '$16.82'], ['', '', '', '', ''], ['', '', '', '', ''], ['54 DAS @ $8.00/DAY = 432.00', '', ''], ['', '', '', '', '', '', '', '', ''], ['', '', '', '', '', '', '', '', '']]
我的代码:
^{pr2}$产生:
second data: <filter object at 0x05F23CF0>
third data: [['#0721', '', '', '', ''], ['', '', '', '', ''], ['', '', '', '', ''], ['GBE COD', '746', '$2.00', '', '$1,492.00'], ['GBW COD', '13,894', '$0.50', '', '$6,947.00'], ['GOM COD', '60', '$2.00', '', '$120.00'], ['GB WINTER FLOUNDER', '94,158', '$0.25', '', '$23,539.50'], ['GOM WINTER FLOUNDER', '3,030', '$0.50', '', '$1,515.00'], ['GBE HADDOCK', '18,479', '$0.02', '', '$369.58'], ['GOM HADDOCK', '0', '$0.02', '', '$0.00'], ['GBW HADDOCK', '110,470', '$0.02', '', '$2,209.40'], ['HAKE', '259', '$1.30', '', '$336.70'], ['PLAICE', '3,738', '$0.40', '', '$1,495.20'], ['POLLOCK', '3,265', '$0.02', '', '$65.30'], ['WITCH FLOUNDER', '1,134', '$1.30', '', '$1,474.20'], ['SNE YT', '1,458', '$0.65', '', '$947.70'], ['GB YT', '4,499', '$0.70', '', '$3,149.30'], ['REDFISH', '841', '$0.02', '', '$16.82'], ['', '', '', '', ''], ['', '', '', '', ''], ['54 DAS @ $8.00/DAY = 432.00', '', ''], ['', '', '', '', '', '', '', '', ''], ['', '', '', '', '', '', '', '', '']]
结果什么都没做,为什么?在
您可以使用
any(a_list)
,如果a_list
的任何元素的计算结果为True
,那么它就是True
,就像非空字符串一样。在你已经指出你的列表列表是空的。在
要解决您的问题,您应该更改传递给filter的第一个参数。filter(function,iterable)将返回一个列表,其中包含函数返回true的iterable值。在
在你的案子上,试试:
相关问题 更多 >
编程相关推荐