Function decode

Lib/base64.py:398–402

Decode a file; input and output are binary files.

(input, output)

def decode(input, output):
    """Decode a file; input and output are binary files."""
    while line := input.readline():
        s = binascii.a2b_base64(line)
        output.write(s)

def _input_type_check(s):
    try: