Create a Hash of a File

hash_file.py

import os
import hashlib

def sha256sum(filename):
    """
    Create a file hash
    :param: str (file path)
    :return: str (md5 hash)
    """
    h  = hashlib.sha256()
    b  = bytearray(128*1024)
    mv = memoryview(b)
    with open(filename, 'rb', buffering=0) as f1:
        for n in iter(lambda : f1.readinto(mv), 0):
            h.update(mv[:n])
    return h.hexdigest()

filehash = sha256sum(os.getcwd() + '/' + 'fourletterwords.txt')
print('File Hash: {}'.format(filehash))