Regex match in train_val_split_random()

[jmontalvo94]

Environment

• Grid2op version: 1.4.0
• System: WSL Ubuntu 20.04.2 LTS

Bug description

When using train_val_split_random() an error is raised with any input.

How to reproduce

import grid2op
env = grid2op.make("l2rpn_case14_sandbox")
nm_env_train, nm_env_val = env.train_val_split_random()

Current output

Regex matches any input, so it fails given the condition statement.

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/jorge/code/bdonnot/Grid2Op/grid2op/Environment/Environment.py", line 1081, in train_val_split_random
    raise EnvError("The suffixes you can use for training data (add_for_train) "
grid2op.Exceptions.EnvExceptions.EnvError: Grid2OpException EnvError "The suffixes you can use for training data (add_for_train) should match the regex "^[a-zA-Z0-9]*$""

Expected output

Splitted dataset.

[BDonnot]

Hello,

Thanks for this issue. Really well explained and can be reproduced easily !

I added the fix you proposed but committed myself because i also modified other part of the code.

I'll close the issue when new version will be out :-)

Benjamin

[BDonnot]

Fixed in release 1.5.0