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"""Module for dynamic data transfrom."""
import os
import importlib
from .transform import (
make_transforms,
get_specials,
save_transforms,
load_transforms,
TransformPipe,
Transform,
)
AVAILABLE_TRANSFORMS = {}
def get_transforms_cls(transform_names):
"""Return valid transform class indicated in `transform_names`."""
transforms_cls = {}
for name in transform_names:
if name not in AVAILABLE_TRANSFORMS:
raise ValueError("%s transform not supported!" % name)
transforms_cls[name] = AVAILABLE_TRANSFORMS[name]
return transforms_cls
__all__ = [
"get_transforms_cls",
"get_specials",
"make_transforms",
"load_transforms",
"save_transforms",
"TransformPipe",
"prepare_transforms",
]
def register_transform(name):
"""Transform register that can be used to add new transform class."""
def register_transfrom_cls(cls):
if name in AVAILABLE_TRANSFORMS:
raise ValueError("Cannot register duplicate transform ({})".format(name))
if not issubclass(cls, Transform):
raise ValueError(
"transform ({}: {}) must extend Transform".format(name, cls.__name__)
)
AVAILABLE_TRANSFORMS[name] = cls
return cls
return register_transfrom_cls
# Auto import python files in this directory
transform_dir = os.path.dirname(__file__)
for file in os.listdir(transform_dir):
path = os.path.join(transform_dir, file)
if (
not file.startswith("_")
and not file.startswith(".")
and (file.endswith(".py") or os.path.isdir(path))
):
file_name = file[: file.find(".py")] if file.endswith(".py") else file
module = importlib.import_module("onmt.transforms." + file_name)
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