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registry.py
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registry.py
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# coding=utf-8
# Copyright 2022 The Pix2Seq Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ==============================================================================
"""General Registry."""
from typing import Any
from typing import Callable
class Registry(object):
"""Registry."""
def __init__(self):
self._registry = {}
def register(self, key: str) -> Callable[[Any], None]:
"""Returns callable to register value for key."""
def r(item):
if key in self._registry:
raise ValueError("%s already registered!" % key)
self._registry[key] = item
return item
return r
def lookup(self, key: str) -> Any:
"""Looks up value for key."""
if key not in self._registry:
valid_keys = "\n".join(self._registry.keys())
raise ValueError(
"%s not registered!\n\n"
"Valid keys:%s\n\n" %
(key, valid_keys))
return self._registry[key]