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| import sys | |
| from typing import List | |
| # importlib.metadata is new in python3.8 | |
| # We use the backport for older python versions. | |
| if sys.version_info < (3, 8): | |
| import importlib_metadata | |
| else: | |
| import importlib.metadata as importlib_metadata # pylint: disable=E0611 | |
| from mlagents.trainers.stats import StatsWriter | |
| from mlagents_envs import logging_util | |
| from mlagents.plugins import ML_AGENTS_STATS_WRITER | |
| from mlagents.trainers.settings import RunOptions | |
| from mlagents.trainers.stats import TensorboardWriter, GaugeWriter, ConsoleWriter | |
| logger = logging_util.get_logger(__name__) | |
| def get_default_stats_writers(run_options: RunOptions) -> List[StatsWriter]: | |
| """ | |
| The StatsWriters that mlagents-learn always uses: | |
| * A TensorboardWriter to write information to TensorBoard | |
| * A GaugeWriter to record our internal stats | |
| * A ConsoleWriter to output to stdout. | |
| """ | |
| checkpoint_settings = run_options.checkpoint_settings | |
| return [ | |
| TensorboardWriter( | |
| checkpoint_settings.write_path, | |
| clear_past_data=not checkpoint_settings.resume, | |
| hidden_keys=["Is Training", "Step"], | |
| ), | |
| GaugeWriter(), | |
| ConsoleWriter(), | |
| ] | |
| def register_stats_writer_plugins(run_options: RunOptions) -> List[StatsWriter]: | |
| """ | |
| Registers all StatsWriter plugins (including the default one), | |
| and evaluates them, and returns the list of all the StatsWriter implementations. | |
| """ | |
| all_stats_writers: List[StatsWriter] = [] | |
| if ML_AGENTS_STATS_WRITER not in importlib_metadata.entry_points(): | |
| logger.warning( | |
| f"Unable to find any entry points for {ML_AGENTS_STATS_WRITER}, even the default ones. " | |
| "Uninstalling and reinstalling ml-agents via pip should resolve. " | |
| "Using default plugins for now." | |
| ) | |
| return get_default_stats_writers(run_options) | |
| entry_points = importlib_metadata.entry_points()[ML_AGENTS_STATS_WRITER] | |
| for entry_point in entry_points: | |
| try: | |
| logger.debug(f"Initializing StatsWriter plugins: {entry_point.name}") | |
| plugin_func = entry_point.load() | |
| plugin_stats_writers = plugin_func(run_options) | |
| logger.debug( | |
| f"Found {len(plugin_stats_writers)} StatsWriters for plugin {entry_point.name}" | |
| ) | |
| all_stats_writers += plugin_stats_writers | |
| except BaseException: | |
| # Catch all exceptions from setting up the plugin, so that bad user code doesn't break things. | |
| logger.exception( | |
| f"Error initializing StatsWriter plugins for {entry_point.name}. This plugin will not be used." | |
| ) | |
| return all_stats_writers | |