How do you combine more than one pathlib object?

Question

I've got two Path objects using Python's pathlib library, pathA = Path('/source/parent') and pathB = Path('/child/grandchild'). What's the most direct way to combine the two so that you get a Path('/source/parent/child/grandchild') object?

Answer 1

According to the docs:

You can do this easy by pathlib.PurePath(*pathsegments)

"Each element of pathsegments can be either a string representing a path segment, an object implementing the os.PathLike interface which returns a string, or another path object."

>>> PurePath('foo', 'some/path', 'bar')
PurePosixPath('foo/some/path/bar')
>>> PurePath(Path('foo'), Path('bar'))
PurePosixPath('foo/bar')

So for you it would be:

pathA = pathlib.Path('source/parent')
pathB = pathlib.Path('child/grandchild')
pathAB = pathlib.PurePath(pathA, pathB)

Output: source/parent/child/grandchild

Note

"When several absolute paths are given, the last is taken as an anchor (mimicking os.path.join()’s behaviour):"

>>> PurePath('/etc', '/usr', 'lib64')
PurePosixPath('/usr/lib64')
>>> PureWindowsPath('c:/Windows', 'd:bar')
PureWindowsPath('d:bar')

Even when you do this:

pathA = pathlib.Path('/source/parent')
pathB = pathlib.Path('/child/grandchild')
pathAB = pathlib.PurePath(pathA, pathB)

Pathlib will handle pathB like a path object that is represented by a string.

Output: source/child/grandchild