print()

Output always goes to the host via a print callback (vm.print_writer). The host decides where it ends up — there is no real sys.stdout underneath (see sys.md).

Supported keyword arguments

• sep=... — separator between arguments. None falls back to a single space. Must be a str or None; otherwise TypeError.
• end=... — appended after the last argument. None falls back to "\n". Must be a str or None; otherwise TypeError.

Rejected / ignored

• file=... — explicitly rejected with TypeError: "print() 'file' argument is not supported". Code that does print(..., file=sys.stderr) will not work; sys.stderr is an opaque marker (see sys.md).
• flush=... — silently accepted but ignored. Monty does not buffer print output; the host receives each call immediately.
• Any other keyword raises TypeError: ... unexpected keyword argument.

Behaviour

• Each positional argument is converted via py_str (equivalent to str(x)) before being written.
• The host callback receives the formatted string for each chunk; there is no atomicity guarantee across multiple print() calls if the host interleaves with other output.