I wasn't happy with any of these approaches, so I came up with a Flexlist class that allows for flexible indexing, either by integer, slice or index-list: class Flexlist(list):

ValueError: 2 is not in list If this is a concern, either explicitly check first using item in my_list, or handle the exception with try / except as appropriate. The explicit check is simple and …

Note that contrary to usual Python slices (see above), in Pandas Dataframes both the start and the stop are included when present in the index. For further info see the Pandas indexing …

The fastest way to access indexes of list within loop in Python 3.7 is to use the enumerate method for small, medium and huge lists. Please see different approaches which can be used to …

In Python 3, your example range (N) [::step] produces a range object, not a list. To really see what is happening, you need to coerce the range to a list, np.array, etc.

Getting indices of True values in a boolean list Asked 11 years, 4 months ago Modified 2 years, 4 months ago Viewed 329k times

I need to choose some elements from the given list, knowing their index. Let say I would like to create a new list, which contains element with index 1, 2, 5, from given list [-2, 1, 5, 3, 8, 5, 6]...

Aug 28, 2016 · Which is faster a dictionary retrieve or a list indexing? Asked 8 years, 9 months ago Modified 8 years, 9 months ago Viewed 9k times

Iterate a list with indexes [duplicate] Asked 16 years, 9 months ago Modified 2 years, 1 month ago Viewed 344k times

67 If I have a list of lists and just want to manipulate an individual item in that list, how would I go about doing that? For example: List1 = [[10,13,17],[3,5,1],[13,11,12]] What if I want to take a …