Python os.path.isfile() Function

The os module in the standard library includes the path sub-module which provides useful functions for working with and manipulating paths.

The isfile() function in the path sub-module is used to  determine whether a given path is an existing regular file. Typically, a file, has contents stored in it unlike a directory or a link. Normally, files have an extension which is used to determine the type of file, for example Python files usually have a ".py" extension.

To use the isfile() function, we will first need to import it in our program as follows.

from os.path import isfile

from os.path import isfile

paths = ['images/john.png', 'project/files/tests.py', 'project/static/css/styles.css', 'project/static/js/animations.js']

for p in paths:
    print(isfile(p))

The isfile() function asserts whether the input path represents a file that actually exists, True if so, False otherwise. The path can be relative to the current working directory or an absolute path.

from os.path import isfile

paths = ['project/images/john.png', 'project/tests.py', 'project/static/styles.css', 'project/main.py']
for p in paths:
    print(isfile(p))

In the  above example, we tested the isfile() function with some relative paths. The function returned True because the files existed in the computer the interpreter was run.