Ok it's technically a +Output interpreter, but whatever.
-Output is another language btw.
Since -Output requires the codebox to be shown, I made the +Output interpreter only. (And I'm too lazy to make -Output even though it's pretty easy)
Check out -Output on the esolangs.org wiki and +Output for information on these two esolangs.
(use the method below, not this one). Firstly download the 2 files. plusOutput.py is the interpreter and code.poutput is the code file. To change the code file path, modify the source and at the bottom change the file name. The interpreter reads the code file.
Download plusOutputCMD.py and supply it with any file to read as an argument.