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#!/usr/bin/env python | ||
# | ||
# Copyright 2015 leenjewel | ||
# | ||
# 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. | ||
# | ||
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import sys | ||
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def _resolve_name(name, package, level): | ||
''' | ||
Return the absolute name of the module to be imported. | ||
''' | ||
if not hasattr(package, 'rindex'): | ||
raise ValueError('"package" not set to a string') | ||
dot = len(package) | ||
for x in xrange(level, 1, -1): | ||
try: | ||
dot = package.rindex('.', 0, dot) | ||
except ValueError: | ||
raise ValueError('attempted relative import beyond top-level package') | ||
return '%s.%s' % (package[:dot], name) | ||
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def import_module(name, package=None): | ||
''' | ||
Import a module. | ||
The 'package' argument is required when performing a relative import. It | ||
specifies the package to use as the anchor point from which to resolve the | ||
relative import to an absolute import. | ||
''' | ||
if name.startswith('.'): | ||
if not package: | ||
raise TypeError('relative imports require the "package" argument') | ||
level = 0 | ||
for character in name: | ||
if character != '.': | ||
break | ||
level += 1 | ||
name = _resolve_name(name[level:], package, level) | ||
__import__(name) | ||
return sys.modules[name] | ||
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