Determinate the absolute path of a file in Python

absolutePath.py

import os


def getcurrentloc(fileName):
    isfile = os.path.isfile(fileName)
    notfound = (str(fileName) + " does not exist")
    if isfile:   # if (True) file exist return the path
        return os.path.abspath(fileName)
    else:
        print notfound

file_Name = "whatever.txt"
myfile = getcurrentloc(file_Name)

print(myfile)