Python slicing is a computationally fast way to methodically access parts of your data. In my opinion, to be even an intermediate Python programmer, it's one aspect of the language that it is necessary to …

405 How do I concatenate two lists in Python? As of 3.9, these are the most popular stdlib methods for concatenating two (or more) lists in Python. ... * A solution will qualify as a generalized solution if it …

In Python 3, filter doesn't return a list, but a generator-like object. Finding the first occurrence If you only want the first thing that matches a condition (but you don't know what it is yet), it's fine to use a for …

How would I use python to check a list and delete all duplicates? I don't want to have to specify what the duplicate item is - I want the code to figure out if there are any and remove them if so, keeping only …

First, I strongly recommend that you rename your variable list to something else. list is the name of the built-in list constructor, and you're hiding its normal function. I will rename list to a in the following. …

Jun 11, 2012 · The Python 2 documentation says: Built-in Functions: map (function, iterable, ...) Apply function to every item of iterable and return a list of the results. If additional iterable arguments are pa...

4149 new_list = my_list doesn't actually create a second list. The assignment just copies the reference to the list, not the actual list, so both new_list and my_list refer to the same list after the assignment. …

Caveats Linear time-complexity in list length An index call checks every element of the list in order, until it finds a match. If the list is long, and if there is no guarantee that the value will be near the …

This converts my_list to a list of tuples (v,i) where v is every item of my list and i is the correspondent index, then it gets the tuple with the maximun value and with its associated index too:

If your list of lists comes from a nested list comprehension, the problem can be solved more simply/directly by fixing the comprehension; please see How can I get a flat result from a list …