os.walk os.listdir

`os.walk` and `os.listdir` are both Python functions used to traverse directories and retrieve information about the files and subdirectories within them.

`os.walk` is a generator function that returns a tuple of three values for each directory it traverses: the path of the directory, a list of the subdirectories within that directory, and a list of the files within that directory. This function is often used to recursively traverse a directory tree and perform operations on all the files and directories within it.

Here's an example of using `os.walk` to print out the names of all the files in a directory tree:

import os

root_dir = '/path/to/root/dir'

for dirpath, dirnames, filenames in os.walk(root_dir):
    for filename in filenames:
        print(os.path.join(dirpath, filename))

`os.listdir`, on the other hand, is a simpler function that returns a list of all the files and directories within a given directory. It does not recursively traverse subdirectories, but only returns the names of the files and directories within the specified directory.

Here's an example of using `os.listdir` to print out the names of all the files in a directory:

import os

dir_path = '/path/to/dir'

for filename in os.listdir(dir_path):
    if os.path.isfile(os.path.join(dir_path, filename)):
        print(filename)