Add install list command

d3rlpy/cli.py

@@ -359,9 +359,25 @@ def _uninstall_module(name: List[str], check: bool = True) -> None:
     subprocess.run(["pip3", "uninstall", "-y", *name], check=check)
 
 
+INSTALL_OPTIONS = {
+    "atari": "Atari 2600 environments for Gym.",
+    "d4rl_atari": "Datasets for Atari 2600. https://github.com/takuseno/d4rl-atari",
+    "d4rl": "D4RL.",
+    "minari": "Minari.",
+    "dm_control": "DeepMind Control environments via Shimmy.",
+}
+
+
 @cli.command(short_help="Install additional packages.")
 @click.argument("name")
 def install(name: str) -> None:
+
+    def print_available_options() -> None:
+        print("List of available options.")
+        for name, description in INSTALL_OPTIONS.items():
+            padding = " " * (15 - len(name))
+            print(f"{name + padding}: {description}")
+
     if name == "atari":
         _install_module(["gym[atari,accept-rom-license]"], upgrade=True)
     elif name == "d4rl_atari":
@@ -375,5 +391,8 @@ def install(name: str) -> None:
         _install_module(["minari==0.4.2", "gymnasium_robotics"], upgrade=True)
     elif name == "dm_control":
         _install_module(["shimmy[dm-control]==1.3.0"], upgrade=True)
+    elif name == "list":
+        print_available_options()
     else:
+        print_available_options()
         raise ValueError(f"Unsupported command: {name}")