Draft: Adding Sampling Bounds and Random Number Generators

[gdelato2]

Summary of changes:

1. Modified pro_gym\utils\utils.py generate_random_actions

• action space is parsed for any specified ranges; defaults to using init_val and random_range
• the addition of an optional random_numbers input; allows for external random number generators
• checks for random_numbers validity
• random_numbers are generated before the loop and are deleted as they are used

2. Added pro_gym\utils\utils.py generate_batch_actions

• function to generate a batch of actions
• calls generate_random_actions in a loop, uses the optional random_numbers input
• multiple options for random number generators

3. Added pro_gym\utils\utils.py sample_random_value

• simple helper function that generates parameter values from random numbers
• default to delete the random number once it is used

4. Modified pro_gym\examples data_generator:

• accepts an addition parameter to select the random number generator
• uses generate_batch_actions if LHS or Sobol generator is selected

6. Added pro_gym\examples\config natural_gas_proc_ranges.yaml

• used for testing new features

Working on/Issues:

1. Some testing and cleanup and comments
2. DWSIM crashes after a few samples. I am looking into whether it is my installation/environment or something else

[gdelato2]

More on DWSIM crashing:

Restored to main for testing

• The crash happens on line 78 in pro_gym/envs/dwsim_env.py when the simulation is restored to its original state.
• Occurs after a few samples have been completed (~4)
• Crash also occurs if GetSnapshot and RestoreSnapshot methods are used to return the simulation to its original state.
• Reloading the simulation after each sample was the only way I was able to get more than ten samples out (self.sim = self.interf.LoadFlowsheet(path))
• Reloading simulation adds a few seconds per sample