Check if file is readable with Python: try or if/else?

A more explicit way to check if file is actually a file and not directory for example, and it is readable:

from os import access, R_OK
from os.path import isfile

file = "/some/path/to/file"

assert isfile(file) and access(file, R_OK), \
       f"File {file} doesn't exist or isn't readable"