-module(hello).
-export([hello/1]).


hello(Name) ->
    % Spawn hello.py script and open communication channels
    Port = open_port({spawn, "python -u hello.py"},
        [{packet, 1}, binary, use_stdio]),
    % Convert tuple {hello, Name} to external term format
    ReqData = term_to_binary({hello, Name}),
    % Send binary data to hello.py script
    port_command(Port, ReqData),
    % Wait for reply from hello.py script
    receive
        {Port, {data, RespData}} ->
            % Convert binary data to term
            {ok, binary_to_term(RespData)}
    after
        5000 ->
            {error, timeout}
    end.