Love2d console on PyCharm only writes to console after closing

Question

I'm using PyCharm community edition to create a love2d application. I've created a hotkey that runs a .bat file to run it with lovec.exe which is opens the console as the app runs, then i've created an external tool to run the .batfile through a keyboard shortcut, when i use it, the console opens within PyCharm, which doesn't write anything, and after closing the app, everything that was meant to have been written appears, when i run the .bat file outside of PyCharm it functions perfectly.

I would like to know if there's either an obvious fix to that or, just how to run the console outside of pycharm through an external tool.

Answer 1

This issue is due to the way Lua delays writing files, known as "buffering." To change it, put the following command at the top of your file:

io.stdout:setvbuf( 'no' ) -- Switches buffering for stdout to be off

Read more in Lua's manual:

file:setvbuf (mode [, size])

Sets the buffering mode for an output file. There are three available modes:

• "no": no buffering; the result of any output operation appears immediately.
• "full": full buffering; output operation is performed only when the buffer is full or when you explicitly flush the file (see io.flush).
• "line": line buffering; output is buffered until a newline is output or there is any input from some special files (such as a terminal device).

For the last two cases, size specifies the size of the buffer, in bytes. The default is an appropriate size.