Python check file exists

Python has built-in module os for interacting with operating system. It has function exists to check if file exists. It returns True if file exists and False otherwise.

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Documentation

We will use documents directory in this notebook:

documents/
├── music
│   ├── bass-guitar-sample.mp3
│   ├── first-song.mp3
│   ├── italo-disco.mp3
│   └── rave.wav
├── my-cv.pdf
├── phd-thesis.txt
├── todo.txt
└── video
    ├── holidays-2023.mp4
    ├── holidays-2024.mp4
    └── zoo.mov


# import packages
from os.path import exists

Checking file which does exist.

# check if file exists and assign this information to variable
my_file_exists = exists(r"/home/piotr/documents/my-cv.pdf")
# display information
if my_file_exists:
    print(f"File /home/piotr/documents/my-cv.pdf exists")
else:
    print(f"File /home/piotr/documents/my-cv.pdf does not exists")

Checking files which doesn't exist.

# check if file exists and assign this information to variable
my_file_exists = exists(r"/home/piotr/documents/music/no-such-file.mp3")
# display information
if my_file_exists:
    print(f"File /home/piotr/documents/music/no-such-file.mp3 exists")
else:
    print(f"File /home/piotr/documents/music/no-such-file.mp3 does not exists")

In the above code nisppets, we have used if condition to display message about file. You can put your custom code in the if condition.

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