Python: Adding element to list while iterating

Question

I know that it is not allowed to remove elements while iterating a list, but is it allowed to add elements to a python list while iterating. Here is an example:

Answer 1

You could use the islice from itertools to create an iterator over a smaller portion of the list. Then you can append entries to the list without impacting the items you're iterating over:

islice(myarr, 0, len(myarr)-1)

Even better, you don't even have to iterate over all the elements. You can increment a step size.