45 lines
1.4 KiB
Python
45 lines
1.4 KiB
Python
# -*- coding: utf-8 -*-
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from __future__ import unicode_literals
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import os
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from compressor.exceptions import FilterError
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def get_class(class_string, exception=FilterError):
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"""
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Convert a string version of a function name to the callable object.
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"""
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if not hasattr(class_string, '__bases__'):
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try:
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class_string = str(class_string)
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mod_name, class_name = get_mod_func(class_string)
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if class_name:
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return getattr(__import__(mod_name, {}, {}, [str('')]), class_name)
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except AttributeError as e:
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raise exception('Failed to import %s. AttributeError is: %s' % (class_string, e))
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except ImportError as e:
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raise exception('Failed to import %s. ImportError is: %s' % (class_string, e))
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raise exception("Invalid class path '%s'" % class_string)
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def get_mod_func(callback):
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"""
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Converts 'django.views.news.stories.story_detail' to
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('django.views.news.stories', 'story_detail')
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"""
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try:
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dot = callback.rindex('.')
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except ValueError:
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return callback, ''
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return callback[:dot], callback[dot + 1:]
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def get_pathext(default_pathext=None):
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"""
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Returns the path extensions from environment or a default
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"""
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if default_pathext is None:
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default_pathext = os.pathsep.join(['.COM', '.EXE', '.BAT', '.CMD'])
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return os.environ.get('PATHEXT', default_pathext)
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