Get absolute paths of all files in a directory

If the argument given to os.walk is absolute, then the root dir names yielded during iteration will also be absolute. So, you only need to join them with the filenames:

import os

for root, dirs, files in os.walk(os.path.abspath("../path/to/dir/")):
    for file in files:
        print(os.path.join(root, file))

If you have Python 3.4 or newer you can use pathlib (or a third-party backport if you have an older Python version):

import pathlib
for filepath in pathlib.Path(directory).glob('**/*'):
    print(filepath.absolute())

os.path.abspath makes sure a path is absolute. Use the following helper function:

import os

def absoluteFilePaths(directory):
    for dirpath,_,filenames in os.walk(directory):
        for f in filenames:
            yield os.path.abspath(os.path.join(dirpath, f))