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DOWNLOAD_CALLBACK = None
def set_download_callback(callback):
global DOWNLOAD_CALLBACK
if not callable(callback):
raise AttributeError('Callback has to be a function')
DOWNLOAD_CALLBACK = callback
def get_download_callback(context_str):
if not DOWNLOAD_CALLBACK:
return None
def callback(args):
return DOWNLOAD_CALLBACK(context_str, args)
return callback
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