LÖVE

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-- conf.lua
function love:conf()
  self.console=true
end

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-- main.lua
if not love then os.execute "love ." os.exit() end
os.execute "start /min python server.py"
local socket=require "socket"

local app={ text="press 1", t=0 }

function love.update(dt) app.t=app.t+dt end

function love.draw()
  love.graphics.print(("%s t=%.2f"):format(app.text,app.t),10,10)
end

function command(cmd)
  local s=socket.tcp() s:connect("127.0.0.1",32768)
  s:send(cmd) local res=s:receive "*a" s:close()
  return res
end

function love.keypressed(key)
  if key=='q' or key=='escape' then command "quit" end
  if key=='escape' then love.event.quit() end
  if key=='1' then app.text=command "hello" end
end

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# server.py
import socket,sys

s=socket.socket(socket.AF_INET, socket.SOCK_STREAM)  
s.bind(('127.0.0.1',32768))  
s.listen(5) 
while True:  
    con,addr=s.accept()  
    buf=con.recv(1024)  
    print(buf)
    con.send(buf+" from python\n")
    con.close()
    if buf=="quit": sys.exit()

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os.execute("pythonw.exe Script.pyw 1>stdout.txt 2>stderr.txt")