Deep Q-Learning, Spaceinvaders, retro-gym

[Yaroina]

Hi!
I’m trying to run SpaceInvaders, but faced problem with:” Game not found: Did you make sure to import the ROM?”. Then I tried solution by MaximusWudy, with point and renaiming files to .a26 (as adviced at openai/retro). But when I try to run “python3 -m retro.import (…)” it always comes with error
Importing 130863 potential games…
Traceback (most recent call last):
File “//anaconda/lib/python3.5/runpy.py”, line 184, in _run_module_as_main
“main”, mod_spec)
File “//anaconda/lib/python3.5/runpy.py”, line 85, in _run_code
exec(code, run_globals)
File “//anaconda/lib/python3.5/site-packages/retro/import/main.py”, line 4, in
main()
File “//anaconda/lib/python3.5/site-packages/retro/scripts/import_path.py”, line 18, in main
retro.data.merge(*potential_roms, quiet=False)
File “//anaconda/lib/python3.5/site-packages/retro/data/init.py”, line 404, in merge
known_hashes[sha] = (game, ext, os.path.join(path(), curpath))
UnboundLocalError: local variable ‘ext’ referenced before assignment
To be honest, I have no idea what to try next.

[noobmaster29]

Here's my current solution:

1. download this file: http://www.atarimania.com/rom_collection_archive_atari_2600_roms.html
2. unzip and put the roms folder it in your working (notebook) folder
3. After the first import cell:
   !python3 -m retro.import ./roms
   env = retro.make(game='SpaceInvaders-Atari2600')

It currently works for me.

Hope this helps :)

Forgot to add this reference: openai/retro#53

[LucasColas]

How to import ROM on Google Colab ?