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gallery-dl/gallery_dl/downloader/__init__.py

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887 B

# -*- coding: utf-8 -*-
10 years ago
# Copyright 2015-2018 Mike Fährmann
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
"""Downloader modules"""
import importlib
def find(scheme):
"""Return downloader class suitable for handling the given scheme"""
try:
return _cache[scheme]
except KeyError:
klass = None
try:
if "." not in scheme: # prevent relative imports
module = importlib.import_module("." + scheme, __package__)
klass = module.__downloader__
except (ImportError, AttributeError, TypeError):
pass
_cache[scheme] = klass
return klass
# --------------------------------------------------------------------
# internals
_cache = {}