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# Copyright (c) Facebook, Inc. and its affiliates.
import os
import tempfile
import unittest
import yaml
from omegaconf import OmegaConf
from omegaconf import __version__ as oc_version
from dataclasses import dataclass
from detectron2.config import instantiate, LazyCall as L
from detectron2.layers import ShapeSpec
OC_VERSION = tuple(int(x) for x in oc_version.split(".")[:2])
class TestClass:
def __init__(self, int_arg, list_arg=None, dict_arg=None, extra_arg=None):
self.int_arg = int_arg
self.list_arg = list_arg
self.dict_arg = dict_arg
self.extra_arg = extra_arg
def __call__(self, call_arg):
return call_arg + self.int_arg
@dataclass
class TestDataClass:
x: int
y: str
@unittest.skipIf(OC_VERSION < (2, 1), "omegaconf version too old")
class TestConstruction(unittest.TestCase):
def test_basic_construct(self):
objconf = L(TestClass)(
int_arg=3,
list_arg=[10],
dict_arg={},
extra_arg=L(TestClass)(int_arg=4, list_arg="${..list_arg}"),
)
obj = instantiate(objconf)
self.assertIsInstance(obj, TestClass)
self.assertEqual(obj.int_arg, 3)
self.assertEqual(obj.extra_arg.int_arg, 4)
self.assertEqual(obj.extra_arg.list_arg, obj.list_arg)
objconf.extra_arg.list_arg = [5]
obj = instantiate(objconf)
self.assertIsInstance(obj, TestClass)
self.assertEqual(obj.extra_arg.list_arg, [5])
def test_instantiate_other_obj(self):
# do nothing for other obj
self.assertEqual(instantiate(5), 5)
x = [3, 4, 5]
self.assertEqual(instantiate(x), x)
x = TestClass(1)
self.assertIs(instantiate(x), x)
x = {"xx": "yy"}
self.assertIs(instantiate(x), x)
def test_instantiate_lazy_target(self):
# _target_ is result of instantiate
objconf = L(L(len)(int_arg=3))(call_arg=4)
objconf._target_._target_ = TestClass
self.assertEqual(instantiate(objconf), 7)
def test_instantiate_lst(self):
lst = [1, 2, L(TestClass)(int_arg=1)]
x = L(TestClass)(int_arg=lst) # list as an argument should be recursively instantiated
x = instantiate(x).int_arg
self.assertEqual(x[:2], [1, 2])
self.assertIsInstance(x[2], TestClass)
self.assertEqual(x[2].int_arg, 1)
def test_instantiate_namedtuple(self):
x = L(TestClass)(int_arg=ShapeSpec(channels=1, width=3))
# test serialization
with tempfile.TemporaryDirectory() as d:
fname = os.path.join(d, "d2_test.yaml")
OmegaConf.save(x, fname)
with open(fname) as f:
x = yaml.unsafe_load(f)
x = instantiate(x)
self.assertIsInstance(x.int_arg, ShapeSpec)
self.assertEqual(x.int_arg.channels, 1)
def test_bad_lazycall(self):
with self.assertRaises(Exception):
L(3)
def test_instantiate_dataclass(self):
a = L(TestDataClass)(x=1, y="s")
a = instantiate(a)
self.assertEqual(a.x, 1)
self.assertEqual(a.y, "s")
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