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b169ac9c2b
* [examples] Generate argparsers from type hints on dataclasses * [HfArgumentParser] way simpler API * Restore run_language_modeling.py for easier diff * [HfArgumentParser] final tweaks from code review
123 lines
3.9 KiB
Python
123 lines
3.9 KiB
Python
import argparse
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import unittest
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from argparse import Namespace
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from dataclasses import dataclass, field
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from enum import Enum
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from typing import Optional
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from transformers.hf_argparser import HfArgumentParser
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from transformers.training_args import TrainingArguments
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@dataclass
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class BasicExample:
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foo: int
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bar: float
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baz: str
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flag: bool
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@dataclass
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class WithDefaultExample:
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foo: int = 42
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baz: str = field(default="toto", metadata={"help": "help message"})
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@dataclass
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class WithDefaultBoolExample:
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foo: bool = False
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baz: bool = True
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class BasicEnum(Enum):
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titi = "titi"
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toto = "toto"
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@dataclass
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class EnumExample:
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foo: BasicEnum = BasicEnum.toto
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@dataclass
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class OptionalExample:
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foo: Optional[int] = None
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bar: Optional[float] = field(default=None, metadata={"help": "help message"})
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baz: Optional[str] = None
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class HfArgumentParserTest(unittest.TestCase):
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def argparsersEqual(self, a: argparse.ArgumentParser, b: argparse.ArgumentParser) -> bool:
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"""
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Small helper to check pseudo-equality of parsed arguments on `ArgumentParser` instances.
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"""
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self.assertEqual(len(a._actions), len(b._actions))
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for x, y in zip(a._actions, b._actions):
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xx = {k: v for k, v in vars(x).items() if k != "container"}
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yy = {k: v for k, v in vars(y).items() if k != "container"}
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self.assertEqual(xx, yy)
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def test_basic(self):
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parser = HfArgumentParser(BasicExample)
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expected = argparse.ArgumentParser()
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expected.add_argument("--foo", type=int, required=True)
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expected.add_argument("--bar", type=float, required=True)
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expected.add_argument("--baz", type=str, required=True)
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expected.add_argument("--flag", action="store_true")
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self.argparsersEqual(parser, expected)
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def test_with_default(self):
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parser = HfArgumentParser(WithDefaultExample)
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expected = argparse.ArgumentParser()
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expected.add_argument("--foo", default=42, type=int)
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expected.add_argument("--baz", default="toto", type=str, help="help message")
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self.argparsersEqual(parser, expected)
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def test_with_default_bool(self):
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parser = HfArgumentParser(WithDefaultBoolExample)
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expected = argparse.ArgumentParser()
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expected.add_argument("--foo", action="store_true")
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expected.add_argument("--no-baz", action="store_false", dest="baz")
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self.argparsersEqual(parser, expected)
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args = parser.parse_args([])
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self.assertEqual(args, Namespace(foo=False, baz=True))
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args = parser.parse_args(["--foo", "--no-baz"])
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self.assertEqual(args, Namespace(foo=True, baz=False))
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def test_with_enum(self):
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parser = HfArgumentParser(EnumExample)
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expected = argparse.ArgumentParser()
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expected.add_argument("--foo", default=BasicEnum.toto, choices=list(BasicEnum), type=BasicEnum)
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self.argparsersEqual(parser, expected)
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args = parser.parse_args([])
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self.assertEqual(args.foo, BasicEnum.toto)
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args = parser.parse_args(["--foo", "titi"])
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self.assertEqual(args.foo, BasicEnum.titi)
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def test_with_optional(self):
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parser = HfArgumentParser(OptionalExample)
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expected = argparse.ArgumentParser()
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expected.add_argument("--foo", default=None, type=int)
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expected.add_argument("--bar", default=None, type=float, help="help message")
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expected.add_argument("--baz", default=None, type=str)
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self.argparsersEqual(parser, expected)
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args = parser.parse_args([])
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self.assertEqual(args, Namespace(foo=None, bar=None, baz=None))
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args = parser.parse_args("--foo 12 --bar 3.14 --baz 42".split())
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self.assertEqual(args, Namespace(foo=12, bar=3.14, baz="42"))
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def test_integration_training_args(self):
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parser = HfArgumentParser(TrainingArguments)
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self.assertIsNotNone(parser)
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