python 3.x - Can I force python3's os.walk to visit directories in alphabetical order? how?

Question

I would like to know if it's possible to force os.walk in python3 to visit directories in alphabetical order. For example, here is a directory and some code that will walk this directory:

ryan:~/bktest$ ls -1 sample
CD01
CD02
CD03
CD04
CD05

--------

def main_work_subdirs(gl):
    for root, dirs, files in os.walk(gl['pwd']):
        if root == gl['pwd']:
            for d2i in dirs:
                print(d2i)

When the python code hits the directory above, here is the output:

ryan:~/bktest$ ~/test.py sample
CD03
CD01
CD05
CD02
CD04

I would like to force walk to visit these dirs in alphabetical order, 01, 02 ... 05. In the python3 doc for os.walk, it says:

When topdown is True, the caller can modify the dirnames list in-place (perhaps using del or slice assignment), and walk() will only recurse into the subdirectories whose names remain in dirnames; this can be used to prune the search, impose a specific order of visiting

Does that mean that I can impose an alphabetical visiting order on os.walk? If so, how?

Answer 1

Yes. You sort dirs in the loop.

def main_work_subdirs(gl):
    for root, dirs, files in os.walk(gl['pwd']):
        dirs.sort()
        if root == gl['pwd']:
            for d2i in dirs:
                print(d2i)