Can't pickle : attribute lookup builtin.function failed
问题 I'm getting the error below, the error only happens when I add delay to process_upload function, otherwise it works without a problem. Could someone explain what this error is, why its happening and any recommendations to resolve? Error: PicklingError at /contacts/upload/configurator/47/ Can't pickle <type 'function'>: attribute lookup __builtin__.function failed This is the view if request.method == 'POST': form = ConfiguratorForm(data=request.POST) # Send import to task. process_upload