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35 lines
1.3 KiB
35 lines
1.3 KiB
4 years ago
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# Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You 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 implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Lazy imports for heavy dependencies."""
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import importlib
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def try_import(module_name):
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"""Try importing a module, with an informative error message on failure."""
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install_name = module_name
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if module_name == 'cv2':
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install_name = 'opencv-python'
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try:
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mod = importlib.import_module(module_name)
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return mod
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except ImportError:
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err_msg = (
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"Failed importing {}. This likely means that some paddle modules "
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"requires additional dependencies that have to be "
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"manually installed (usually with `pip install {}`). ").format(
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module_name, install_name)
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raise ImportError(err_msg)
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