JSSEnv Example

import numpy as np
from JSSEnv.envs import JssEnv

in this example we create the instance file instead of downloading it, because https://jobshop.jjvh.nl/ is sometimes down. You can also download the instance from https://jobshop.jjvh.nl/ or use the download utils of the package.

Note: this repo also contains .txt files with instances from https://jobshop.jjvh.nl/ in the resources folder. So that is an alternative to downloading the instances from the website.

# setup the jsp instance
instance_text = """6        6
2   1       0       3       1       6       3       7       5       3       4       6
1   8       2       5       4       10      5       10      0       10      3       4
2   5       3       4       5       8       0       9       1       1       4       7
1   5       0       5       2       5       3       3       4       8       5       9
2   9       1       3       4       5       5       4       0       3       3       1
1   3       3       3       5       9       0       10      4       4       2       1
"""
jsp_std_path = "ft06.txt"
# write the instance to a file
with open(jsp_std_path, "w") as f:
    f.write(instance_text)

# create the environment
env = JssEnv(env_config={'instance_path': jsp_std_path})

# reset the environment
obs = env.reset()

# perform a random action till the environment is done
done = False
while not done:
    # sample a random action
    mask = env.unwrapped.legal_actions.astype(np.int8)
    action = env.action_space.sample(mask=mask)
    # take a step in the environment
    obs, reward, done, info = env.step(action)

    # render the environment

env.render()
print(f"makespan: {env.unwrapped.last_time_step}")

makespan: 80