examplevalid py summary exercises debuggingtestingand profiling debugging dealing with syntax errors dealing with runtime errors scientific debugging unit testing profiling summary processes and threading using the multiprocessing module using the threading module examplea threaded find word program examplea threaded find duplicate files program summary exercises networking creating tcp client creating tcp server summary exercises database programming dbm databases sql databases summary exercise regular expressions python' regular expression language characters and character classes quantifiers grouping and capturing assertions and flags the regular expression module xiii