How to Check Whether a File Exists In Python
Sep 13, 2019 13:10 · 147 words · 1 minute read
Suppose, you want to check if a file exists on a filesystem. Typically, you can do the following:
import os # Is it a file? os.path.isfile(filename)
For any valid paths on the FS, you can do
import os # Does it exist? os.path.exists(path)
In this case, directories, files, symlinks and any other valid existing path return True.
Object oriented way to do the same
import pathlib # For Python 2.7 # import pathlib2 a_path = my_file = Path("/path/to/something") a_path.is_file() # returns True if the path is a file a_path.is_dir() # returns True if the path is a directory a_path.exists() # returns True if the path actually exists
Note, if you plan to
if a_path.exists(): and then
open('path/to/file'), consider to use
approach. The reason is that file might be deleted between the calls.
try: f = open('path/to/file') except FileNotFoundError as e: # Handle exception here pass