my file read is not ahppening after switching to diff folder python code example

Example 1: how to make all my files to work together in python

>>> import os
>>> entries = os.listdir('my_directory/')

Example 2: how to open folder in python

import webbrowser

path = "C:/Users/Username/PycharmProjects"
webbrowser.open(path) # Opens 'PycharmProjects' folder.