Oct 31, 2008 · 677 What is the difference between the list methods append and extend? .append() adds its argument as a single element to the end of a list. The length of the list itself …

ary.extend (ext) merely adds reference to "ext" list to the end of the "ary" list, resulting in less memory transactions. As a result, .extend works orders of magnitude faster and doesn't use …

0.297003984451 #append 0.344678163528 #extend-list 0.292304992676 #extend-tuple Although tuple still consistently beats the list version and barely edges out the append version for all of …

May 2, 2015 · It's overkill to use numpy if there's a built-in extend. Plus, it's a common pitfall to try to return a new list but modify existing in place, and the extend do not allow for it, hence safer.

Sep 11, 2011 · I'm looking for the most pythonic way to implement a version of the list extend function, where it extends to a given index instead of the end of the list. a_list = [ "I", "rad", …

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 …

Sep 28, 2022 · I understand that in order to execute extend, it must first evaluate the generator expression, which in turn references the original list. But here's how I would assume it works …

Apr 8, 2015 · 22 As others have pointed out, extend takes an iterable (such as a list, tuple or string), and adds each element of the iterable to the list one at a time, while append adds its …

Jan 15, 2023 · Closed 2 years ago. In python we can add lists to each other with the extend () method but it adds the second list at the end of the first list.

In general, if you're appending/extended an existing list, and you want to keep the reference to the same list (instead of making a new one), it's best to be explicit and stick with the append …