Convert a binary file to a hexbyte string

hexify_file.py

#!/usr/bin/env python3
import binascii
import argparse
from os import path


parser = argparse.ArgumentParser(description ='Convert input raw binary file to a hex byte string')
parser.add_argument('-i', '--input', dest='input_file', required=True, help="The input file to convert")
parser.add_argument('-o', '--output', dest='output_file', required=False, help="The output file to write to")
args = parser.parse_args()

if path.exists(args.input_file):
    with open(args.input_file, 'rb') as f:
        content = f.read()
        
    if args.output_file:
        try:
            o = open(args.output_file, 'w')
            o.write(binascii.hexlify(content))
            o.close()
        except Exception as e:
            print("ERROR: %s") % (str(e))
    else:
        print(binascii.hexlify(content))
    
    f.close()
    
else:
    print("ERROR: Provided input file does not exist!")