I will give it more looking.
micahrye
sasajuric
Author of Elixir In Action
Here’s the simplest example I can think of which works on my machine:
iex(1)> Port.open({:spawn, ~s/python -c 'print("Hello World!")'/}, [:binary])
#Port<0.5>
iex(2)> flush
{#Port<0.5>, {:data, "Hello World!\n"}}
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micahrye
Yes you are correct, earlier I had made the mistake to use struct.pack("i", 4) in python which returned byte representation in little-endian (my native), but Elixir defaults to big-endian, which I never knew 
Add that to the fact I do not really know Ruby and did not realize, or read closely, that [msg.bytesize].pack(“N”) encodes as an unsigned big-endian integer and I floated off into the confused.
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OvermindDL1
Big Endianness is default on TCP I/O traffic, and since the BEAM is optimized and designed for I/O then that is why it defaults to that.
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