why i don't like os.walk()

[Gribouillis]

here are 2 commands on one line to make a tree and a 2 command pipeline to show the order i want my generator to yield results

os.walk() cannot do that because it only walks directories, not files.

I once wrote a nice generic non-recursive tree/graph traversal module named walktree. Using this module, it is a piece of cake to code your traversal

from collections import namedtuple
from walktree import walk
import os

Node = namedtuple('Node', 'path isdir')    

def subn(node):
    if not node.isdir:
        return ()
    pairs = sorted((e.path, e.is_dir(follow_symlinks=False))
                   for e in os.scandir(node.path))
    return (Node(*p) for p in pairs)


def flatwalk(path):
    root = Node(path, os.path.isdir(path) and not os.path.islink(path))
    for seq in walk(root, subn, walk.enter | walk.leaf):
        yield(seq[-1].path)

if __name__ == '__main__':
    for x in flatwalk('tryme'):
        print(x)

Remark: this code uses scandir() as recommended by G van Rossum.