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chore: import upstream snapshot with attribution
2026-07-13 13:28:58 +08:00

54 lines
1.7 KiB
Python

# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
#
# 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.
"""
Guard for importing optional NeMo dependency k2.
Contains checks for k2 availability and version.
Use `from nemo.core.utils.k2_guard import k2` to import k2 instead of direct import.
If there is an error, the module will raise an exception with a helpful message.
"""
import textwrap
from lightning.pytorch.utilities.imports import package_available
from packaging.version import Version
from nemo.core.utils.k2_utils import K2_INSTALLATION_MESSAGE
__K2_MINIMUM_MAJOR_VERSION = 1
__K2_MINIMUM_MINOR_VERSION = 14
__K2_MINIMUM_VERSION = Version(f"{__K2_MINIMUM_MAJOR_VERSION}.{__K2_MINIMUM_MINOR_VERSION}")
if not package_available("k2"):
raise ModuleNotFoundError("Module k2 is not available.\n" + K2_INSTALLATION_MESSAGE)
import k2 # noqa: E402
try:
__k2_version = Version(k2.__dev_version__)
except AttributeError:
raise ImportError("Module k2 is corrupted.\n" + K2_INSTALLATION_MESSAGE)
if __k2_version < __K2_MINIMUM_VERSION:
raise ImportError(
textwrap.dedent(
f"""
Minimum required k2 version: {__K2_MINIMUM_VERSION};
Installed k2 version: {__k2_version}
"""
)
)