2 There is a good explanation of why it is costly to use + for concatenating a large number of strings here Plus operator is perfectly fine solution to concatenate two Python strings. But if …

Dec 7, 2012 · Here you are using two joins - the inner join joins every element up until the second to last element with a comma. That string is then joined to the last element (a[-1]) using the …

Sep 17, 2012 · For handling a few strings in separate variables, see How do I append one string to another in Python?. For the opposite process - creating a list from a string - see How do I …

Dec 29, 2011 · In most cases you want to use your pythonic '.'.join() approach, but there are legitimate, pythonic uses for str.join() (formerly string.join()) too. For example, you sometimes …

The reason for using str.join() is that adding strings together means creating a new string (and potentially destroying the old ones) for each addition. Python can sometimes optimize this …

May 17, 2019 · Use str.join for large strings. In particular, if constructing a large string, first create a list, then use str.join on it instead of using += on an (at first) empty string.

I need to join a list of items. Many of the items in the list are integer values returned from a function; i.e., myList.append(munfunc()) How should I convert the returned result to a string in

Jul 16, 2013 · Arguably there is a much simpler approach to be found here - just add the character before and after your join function. Others have suggested f-strings, which is a fancy …

Jul 20, 2023 · In python 3.x join () is used to join a thread with the main thread i.e. when join () is used for a particular thread the main thread will stop executing until the execution of joined …

The related DataFrame.join method, uses merge internally for the index-on-index and index-on-column (s) joins, but joins on indexes by default rather than trying to join on common columns …