I'd like to have an option to force the path separator for the "os.path.join()" method. E.g. if I run the script on Windows, but I generate, say, an URL, I'd find it convenient to use the same method, but with an explicit flag to "join" with the forward slash (because URLs use it). Currently I simply use an f-string to combine a path, like e.g.: path = f"{root}/{dir}" but it will insert extra "/" if there if "root" already has "/" on the end. But the "join" method will not, which is a pro for the method vs "manual" string construct. I know there is the "pathlib" module with all conversion methods, but it's overkill for many tasks. So I'd rather like to have an option to write for example: path = os.path.join (root, dir, sep = "posix") So that it joins with the forward slash even if run on Windows. Also it seems that e.g. "os.path.split()" already supports both separators, so I think this addition won't bring inconsistency into the module and its usage.