7fe094ac02
lazy_loader is copied to Ext now, modified external imports to lazy_load add a few more imports to be lazy loaded, think the install path is correct now [TD]"<" symbol embedded in html revert changes to path modules for testing use lazyloader in PathAreaOp.py add back in deferred loading temp change to print error message in tests temp change to print error message in tests add _init__.py to lazy_loader make install in CMakeLists.txt one line
60 lines
2.1 KiB
Python
60 lines
2.1 KiB
Python
# Copyright 2015 The TensorFlow 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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# ==============================================================================
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"""A LazyLoader class."""
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from __future__ import absolute_import
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from __future__ import division
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from __future__ import print_function
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import importlib
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import types
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class LazyLoader(types.ModuleType):
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"""Lazily import a module, mainly to avoid pulling in large dependencies.
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`contrib`, and `ffmpeg` are examples of modules that are large and not always
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needed, and this allows them to only be loaded when they are used.
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"""
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# The lint error here is incorrect.
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def __init__(self, local_name, parent_module_globals, name, warning=None): # pylint: disable=super-on-old-class
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self._local_name = local_name
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self._parent_module_globals = parent_module_globals
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self._warning = warning
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super(LazyLoader, self).__init__(name)
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def _load(self):
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"""Load the module and insert it into the parent's globals."""
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# Import the target module and insert it into the parent's namespace
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module = importlib.import_module(self.__name__)
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self._parent_module_globals[self._local_name] = module
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# Update this object's dict so that if someone keeps a reference to the
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# LazyLoader, lookups are efficient (__getattr__ is only called on lookups
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# that fail).
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self.__dict__.update(module.__dict__)
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return module
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def __getattr__(self, item):
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module = self._load()
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return getattr(module, item)
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def __dir__(self):
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module = self._load()
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return dir(module) |