How can I delete items from my list of tuples? [duplicate]

Answer 1

My answer in this post: Deleting multiple elements from a list

for i in sorted(indices, reverse=True):
    del somelist[i]

See that this does remove the items you want instead of making a new list a replace the original variable with the new list. (I haven't tested which on is more efficient, I would expect this one if the list is large enough)

Answer 2

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()

Sample run -

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]]

---

To retain the format of list of tuples, use map after deleting, like so -

map(tuple,np.delete(mytupList,indxList,axis=0))

Sample run -

In [16]: map(tuple,np.delete(mytupList,indxList,axis=0))
Out[16]: [(1, 2), (5, 6)]