Answer by Tom Fuller for How do I check whether a file exists without exceptions?

Testing for files and folders with os.path.isfile(), os.path.isdir() and os.path.exists()

Assuming that the "path" is a valid path, this table shows what is returned by each function for files and folders:

You can also test if a file is a certain type of file using os.path.splitext() to get the extension (if you don't already know it)

>>> import os>>> path = "path to a word document">>> os.path.isfile(path)True>>> os.path.splitext(path)[1] == ".docx" # test if the extension is .docxTrue