39 lines
1.3 KiB
Python
39 lines
1.3 KiB
Python
# Copyright 2024-present MongoDB, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you
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# may not use this file except in compliance with the License. You
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# may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied. See the License for the specific language governing
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# permissions and limitations under the License.
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from __future__ import annotations
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import importlib.util
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import sys
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from types import ModuleType
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def lazy_import(name: str) -> ModuleType:
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"""Lazily import a module by name
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From https://docs.python.org/3/library/importlib.html#implementing-lazy-imports
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"""
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try:
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spec = importlib.util.find_spec(name)
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except ValueError:
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raise ModuleNotFoundError(name=name) from None
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if spec is None:
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raise ModuleNotFoundError(name=name)
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assert spec is not None
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loader = importlib.util.LazyLoader(spec.loader) # type:ignore[arg-type]
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spec.loader = loader
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module = importlib.util.module_from_spec(spec)
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sys.modules[name] = module
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loader.exec_module(module)
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return module
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