dots/bin/checksum

#!/usr/bin/env python
# Import hashlib library (md5 method is part of it)
import hashlib
import sys

# File to check
file_name = sys.argv[1]

# Correct original md5 goes here
sums = sys.argv[2]

# Open,close, read file and calculate MD5 on its contents
with open(file_name, 'rb') as file_to_check:
    # read contents of the file
    data = file_to_check.read()
    # pipe contents of the file through
    md5_returned = hashlib.md5(data).hexdigest()

# Finally compare original MD5 with freshly calculated
if sums == md5_returned:
    print("MD5 verified.")
else:
    print("MD5 verification failed!.")