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Zero
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# Copyright (c) Meta Platforms, Inc. and affiliates.
import functools
from typing import Any, Callable, Union
from omegaconf import DictConfig, ListConfig, OmegaConf
from hydra.utils import instantiate
TargetType = Union[str, type, Callable[..., Any]]
ClassOrCallableType = Union[type, Callable[..., Any]]
def dump_config(config: DictConfig, path: str = "./config.yaml"):
txt = OmegaConf.to_yaml(config, sort_keys=True)
with open(path, "w") as f:
f.write(txt)
def locate(path: str) -> Any:
if path == "":
raise ImportError("Empty path")
import builtins
from importlib import import_module
parts = [part for part in path.split(".") if part]
# load module part
module = None
for n in reversed(range(len(parts))):
try:
mod = ".".join(parts[:n])
module = import_module(mod)
except Exception as e:
if n == 0:
raise ImportError(f"Error loading module '{path}'") from e
continue
if module:
break
if module:
obj = module
else:
obj = builtins
# load object path in module
for part in parts[n:]:
mod = mod + "." + part
if not hasattr(obj, part):
try:
import_module(mod)
except Exception as e:
raise ImportError(
f"Encountered error: `{e}` when loading module '{path}'"
) from e
obj = getattr(obj, part)
return obj
def full_instance_name(instance: Any) -> str:
return full_class_name(instance.__class__)
def full_class_name(klass: Any) -> str:
module = klass.__module__
if module == "builtins":
return klass.__qualname__ # avoid outputs like 'builtins.str'
return module + "." + klass.__qualname__
def ensure_is_subclass(child_class: type, parent_class: type) -> None:
if not issubclass(child_class, parent_class):
raise RuntimeError(
f"class {full_class_name(child_class)} should be a subclass of {full_class_name(parent_class)}"
)
def find_class_or_callable_from_target(
target: TargetType,
) -> ClassOrCallableType:
if isinstance(target, str):
obj = locate(target)
else:
obj = target
if (not isinstance(obj, type)) and (not callable(obj)):
raise ValueError(f"Invalid type ({type(obj)}) found for {target}")
return obj
def find_and_ensure_is_subclass(target: TargetType, type_: type) -> ClassOrCallableType:
klass = find_class_or_callable_from_target(target)
ensure_is_subclass(klass, type_)
return klass
class StrictPartial:
# remark : the `/` will handle the `path` argument name conflict (e.g. calling StrictPartial("a.b.c", ..., path="/a/b/c"))
def __init__(self, path, /, *args, **kwargs):
class_or_callable = find_class_or_callable_from_target(path)
self._partial = functools.partial(class_or_callable, *args, **kwargs)
def __call__(self, *args: Any, **kwargs: Any) -> Any:
return self._partial(*args, **kwargs)
class RecursivePartial:
@staticmethod
def replace_keys(config, key_mapping):
def recurse(data):
if isinstance(data, DictConfig):
new_data = {
key_mapping[k] if k in key_mapping else k: recurse(v)
for k, v in data.items()
}
new_data = DictConfig(new_data)
elif isinstance(data, ListConfig):
new_data = ListConfig([recurse(item) for item in data])
elif type(data) in {bool, str, int, float, type(None)}:
new_data = data
else:
raise RuntimeError(f"unknow type found : {type(data)}")
return new_data
return recurse(config)
def __init__(self, config):
self.config = RecursivePartial.replace_keys(
config, {"_rpartial_target_": "_target_"}
)
def __call__(self, *args: Any, **kwargs: Any) -> Any:
return instantiate(self.config)
class Partial(StrictPartial):
# remark : allow `path` argument to be exposed for easier use
def __init__(self, path, *args, **kwargs):
super().__init__(path, *args, **kwargs)
def subkey(mapping, key):
return mapping[key]
def make_set(*args):
return set(args)
def make_tuple(*args):
return tuple(args)
def make_list_from_kwargs(**kwargs):
# Filter out None/null values to avoid issues with callbacks
return [v for v in kwargs.values() if v is not None]
def make_string(value):
return str(value)
def make_dict(**kwargs):
return dict(kwargs)
def get_item(data, key: str):
return data[key]
def get_attr(data, key: str):
return getattr(data, key)
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