Python: Check for file existence

Current post is on how to check whether file exists on system running Python 3.2.

First import the 'os.path' module.  os.path module implements some useful functions on pathname.

import os.path

Add the following line to check file.
  
os.path.exists(filename)

It returns True if filename exists else returns False


To make sure it is file and it exists, one can use:

os.path.isfile(filename)

It returns True only if the type is of file and it exists else returns False

Example 1: File Check using 'exists' function

      if os.path.exists("HelloWorld.py"):
           print("Hello World")
      else:
           print("No World !!!")

Example 2: File Check using 'isfile' function

      if os.path.isfile("HelloWorld.py"):
           print("Hello World")
      else:
           print("No World !!!")