CSS image/file embedder (generates data uri)

cssembed.py

import base64
import argparse
import subprocess

parser = argparse.ArgumentParser()
parser.add_argument("file")
args = parser.parse_args()

mime_args = ("mimetype", "-b", args.file)
mime_type = subprocess.run(mime_args, capture_output=True).stdout.decode().strip()

with open(args.file, "rb") as fobj:
    binary_data = fobj.read()

base64_data = base64.b64encode(binary_data).decode()
print(f'url("data:{mime_type};base64,{base64_data}")')