Documentation mentions .sub() function on bytes which doesn't exist.

[otac0n]

From what I've gathered, .sub() appears to be a regex specific function. I believe the correct function for the 'bytes' type is .replace().

e.g.

  blob.data = blob.data.sub(b"Hello", b"Goodbye")

should instead be

  blob.data = blob.data.replace(b"Hello", b"Goodbye")

[newren]

Indeed, you can call bytes.replace(old, new) or re.sub(regex, replacement, old), but you can't mix-and-match and call bytes.sub(). Whoops. Fixed now; thanks for the report.