How to check if path to a file or a directory exists in python ?


Example of how to check if path to a file or a directory exists in python

Checking if path to a file or a directory exists using os.path.exists()

Let consider for example the following path to a file called photo_001.png:

/users/john/images/photo_001.png

to check if the path exists a solution is to use os.path.exists()

import os

    os.path.exists('/users/john/images/photo_001.png')

will returns

True

or

False

if the path exists or not respectively.

It also works if it is a path to a directory:

/users/john/images

the

    os.path.exists('/users/john/images')

returns

True

only if the path /users/john/images exists.

Checking if it is a path to a file

The function os.path.exists() tells you if the path exists, but not if it is a file or a directory.

To check if it is a file, a solution is to use isfile:

For example (assuming that '/users/john/images/photo_001.png' exists)

    os.path.isfile('/users/john/images/photo_001.png')

will returns

True

but

    os.path.isfile('/users/john/images')

will returns

False

since it is a directory and not a file.

So a common usage is to check forst is a pth exists and then to check if it is a file:

    if os.path.exists( "/users/john/images/photo_001.png"):

        if os.path.isfile('/users/john/images/photo_001.png'):

                print('File found !')

Checking if it is a path to a directory

To check if it is a directory, a solution is to use isdir

For example (assuming that '/users/john/images' exists)

    os.path.isdir('/users/john/images')

will returns

True

but

    os.path.isdir('/users/john/images/photo_001.png')

will returns

False

since it is a file and not a directory

How to get a list of files and directories available under a given path

To get a list of files and directories available under a given path for example '/users/john/' a solution is to use os.listdir():

os.path.listdir('/users/john/')

References