import argparse
from pathlib import Path
import yaml
[docs]class ArgumentParser(argparse.ArgumentParser):
"""Simple implementation of ArgumentParser supporting config file
This class is originated from https://github.com/bw2/ConfigArgParse,
but this class is lack of some features that it has.
- Not supporting multiple config files
- Automatically adding "--config" as an option.
- Not supporting any formats other than yaml
- Not checking argument type
"""
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.add_argument("--config", help="Give config file in yaml format")
[docs] def parse_known_args(self, args=None, namespace=None):
# Once parsing for setting from "--config"
_args, _ = super().parse_known_args(args, namespace)
if _args.config is not None:
if not Path(_args.config).exists():
self.error(f"No such file: {_args.config}")
with open(_args.config, "r", encoding="utf-8") as f:
d = yaml.safe_load(f)
if not isinstance(d, dict):
self.error("Config file has non dict value: {_args.config}")
for key in d:
for action in self._actions:
if key == action.dest:
break
else:
self.error(f"unrecognized arguments: {key} (from {_args.config})")
# NOTE(kamo): Ignore "--config" from a config file
# NOTE(kamo): Unlike "configargparse", this module doesn't check type.
# i.e. We can set any type value regardless of argument type.
self.set_defaults(**d)
return super().parse_known_args(args, namespace)