Starter Files for Michigan Data Science Team Pokemon Bots Project
Make sure both node.js v10+ and python 3.6+ are installed. If not already installed visit https://nodejs.org/en/ for node.js and https://www.python.org/downloads/ for python.
First, start a virtualenv, see https://packaging.python.org/guides/installing-using-pip-and-virtual-environments/ for help. Once your virtual environment is started, run
pip install requirements.txt
In terminal, install the python poke-env library
pip install poke-env
In terminal, install a server to run your agent on a clone of https://pokemonshowdown.com
git clone https://github.com/hsahovic/Pokemon-Showdown.git
In terminal, start your server by running
cd Pokemon-Showdown
node pokemon-showdown start --no-security
All credit goes to the great documentation from https://poke-env.readthedocs.io
We will create an Agent that does not require training; as such we can inherit from Player class like this:
from poke_env.player.player import Player
class Agent(Player):
...
The Player base class requires that subclasses implement one function: choose_move which describes the action that your Agent will take given a battle state
choose_move(self, battle: Battle) -> str takes in a battle argument, provided to you by the poke-env infrastructure. The battle argument is an object that holds data about the state of the game as the current move. Dive into the documentation for specifics. It must return a string, specifically the move order encoded into a string.
The Battle object has multiple properties that can make it easy to access game state.
In this example from the documentation, we can define our agent as such.
class Agent(Player):
def move(self, battle):
# If the player can attack, it will
if battle.available_moves:
# Finds the max base power move among available ones
best_move = max(battle.available_moves, key = lambda move : move.base_power)
# Serialize move into a move order string
return self.create_order(best_move)
else:
# Make a random move otherwise
return self.choose_random_move(battle)
In this case some of the methods and properties used were battle.available_moves and move.base_power. Poke-env's core objects, including Battle, Move, etc. provide many many attributes and methods that we can access data useful for creating Agents.
For a more detailed explanation, please visit the official documentation. This example is only meant to give a slight introduction to our environment for PokeRL.