WhyCan Forum(哇酷开发者社区)

#!/usr/bin/lua

io.write("Content-type: text/event-stream\nPragma: no-cache\n\n")
io.flush()

local pipe = io.popen(os.execute("python /www/cgi-bin/shell/app.py"))
io.flush()
for line in pipe:lines() do
   io.write(line)
   io.flush()
end

怎么实时打印 app.py 中打印的消息，现在是运行结束才一次性打印出而不是实时打印