| """ |
| Licensed to the Apache Software Foundation (ASF) under one |
| or more contributor license agreements. See the NOTICE file |
| distributed with this work for additional information |
| regarding copyright ownership. The ASF licenses this file |
| to you 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. |
| """ |
| |
| """ |
| The C extension loader for various platforms. |
| |
| NOTE: this module should be on top level |
| |
| Example of usage: |
| |
| def _import_c_scanstring(): |
| from . import c_extension |
| _speedups = c_extension.get() |
| |
| if _speedups: |
| try: |
| return _speedups.scanstring # import here required functions |
| except AttributeError: |
| pass |
| |
| return None |
| """ |
| |
| |
| def get(): |
| _path = ".".join(__name__.split(".")[:-1]) |
| # trying to load extension from available platforms |
| _import_paths = ["_speedups.posix.usc2", "_speedups.posix.usc4", "_speedups.ppc", "_speedups.win"] |
| |
| for _import_path in _import_paths: |
| try: |
| return __import__("{}.{}".format(_path, _import_path), fromlist=["_speedups"])._speedups |
| except (ImportError, AttributeError): |
| pass |
| |
| return None |
| |
| |
| def is_loaded(): |
| """ |
| :rtype bool |
| """ |
| return get() is not None |
