@stefanct this likely does double the complexity, I believe the in operator on a list has linear runtime. . @ApproachingDarknessFish stated it would iterate twice which answers your …

Python list doesn't provide an index; if you are using for; If you enumerate a list, it will return you ...

This will return a list of tuples with the first element pointing to the index in the outer list and the second element to the index of the word in that sub-list. Share Improve this answer

Ultimately it probably doesn't have a safe .get method because a dict is an associative collection (values are associated with names) where it is inefficient to check if a key is present (and …

TL; DR: use np.where as it is the fastest option. Your options are np.where, itertools.compress, and list comprehension.

@eric on the contrary: it would be really bizarre if L[idx] did do this in base Python. In fact, I can quote the Zen of Python to support that: "Special cases aren't special enough to break the rules."

More in general, given a tuple of indices, how would you use this tuple to extract the corresponding elements from a list, even with duplication (e.g. tuple (1,1,2,1,5) produces …

If you want to remove them from the list, then the Pythonic way is not to necessarily remove from the list, but write a list comprehension as if you were creating a new list, and assigning back in …

Jun 9, 2011 · The iterator enumerate(my_list) yields pairs (index, item) for each item in the list. Using i, x as loop variable target unpacks these pairs into the index i and the list item x. We …

And sometimes people only read the first one and a half lines of the question instead of the whole question. If you get to the end of the second line he says he wants to use it instead of for i in …