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How do I delete a "column" from a list of lists?
Given:
L = [
["a","b","C","d"],
[ 1, 2, 3, 4 ],
["w","x","y","z"]
]
I would like to delete "column" 2 to get:
L = [
["a","b","d"],
[ 1, 2, 4 ],
["w","x","z"]
]
Is there a slice or del method that will do that? Something like:
del L[:][2]
885
Use list slicing to remove every Nth element from a list, e.g. del my_list[::2] . The value between the square brackets is the step which can be used to remove every Nth element from the list. Copied!
There are three ways in which you can Remove elements from List: Using the remove() method. Using the list object's pop() method. Using the del operator.
You could loop.
for x in L:
del x[2]
If you're dealing with a lot of data, you can use a library that support sophisticated slicing like that. However, a simple list of lists doesn't slice.
85
just iterate through that list and delete the index which you want to delete.
for example
for sublist in list:
del sublist[index]
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