Answers for "Which of the following expression can be used to check if the file 'C:\Sample.txt' exists and is also a regular file?"

python check if file exists

import os

os.path.exists("file.txt") # Or folder, will return true or false

how to check whether file exists in python

import os.path

if os.path.isfile('filename.txt'):
    print ("File exist")
else:
    print ("File not exist")

check if a file exists

>>> import os
>>> os.path.isfile("d:\\Package1\\package1\\fibo.py")
True
>>> os.path.isfile("d:/Package1/package1/fibo.py")
True
>>> os.path.isfile("d:\\nonexisting.txt")