get_file_md5

def get_file_md5(filename):

    if not os.path.isfile(filename):
        return
    my_hash = hashlib.md5()
    f = open(filename, 'rb')
    while True:
        b = f.read(8096)  #set the buffer size for readig the data from file every time, can be set random value but always 9096, 8192  
        if not b: # if read all of the data, then break  
            break  
        my_hash.update(b) # set the str that need to be encrypted
    f.close()
    return my_hash.hexdigest() # Gets the encrypted hexadecimal string


references:
offlinerl/neorl