本文介绍了如何从元组列表中删除项目?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我想使用索引列表从元组列表中删除项目:
I want to use a list of indices to remove items from my list of tuples:
mytupList = [(1,2),(2,3),(5,6),(8,9)]
indxList = [1,3]
我已经尝试过使用numpy了，
I have tried using numpy like so:
newtupList = numpy.delete(mytupList,indxList).tolist()
，但没有成功.
我希望我的newtupList = [(1,2)，(5,6)]
I want my newtupList = [(1,2),(5,6)]
我在做什么错?我也尝试过:
what am I doing wrong? I have also tried:
a = np.array(mytupList)
newtup = np.delete((a),indxList)
但这不会产生预期的结果.
but this does not produce the desired result.
推荐答案
如 docs ，您需要在此处使用axis选项，因为如果没有提及它，它将删除扁平化版本上的元素.因此，您需要这样做-
As mentioned in the docs, you need to use the axis option there, because without it being mentioned it would delete elements on a flattened version. Thus, you need to do like this -
np.delete(mytupList,indxList,axis=0).tolist()
样品运行-
In [21]: mytupList
Out[21]: [(1, 2), (2, 3), (5, 6), (8, 9)]
In [22]: indxList
Out[22]: [1, 3]
In [23]: np.delete(mytupList,indxList).tolist() # Flattens and deletes
Out[23]: [1, 2, 5, 6, 8, 9]
In [24]: np.delete(mytupList,indxList,axis=0).tolist() # Correct usage
Out[24]: [[1, 2], [5, 6]]
要保留元组列表的格式，请使用 map 删除后，就像这样-
To retain the format of list of tuples, use map after deleting, like so -
map(tuple,np.delete(mytupList,indxList,axis=0))
样品运行-
In [16]: map(tuple,np.delete(mytupList,indxList,axis=0))
Out[16]: [(1, 2), (5, 6)]
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