handle_input input hook processor applies the processor processor on the input. hook.hook_before is executed once before the processor and hook.hook_after is executed once after the processor. By default (without hooks), if an exception exn has been raised while processing the data it is raised at top-level.

handle_files files hook processor apply a processor on each file of files. hook is used once by file. The result is the one given once each file has been processed.