three programing exercises, from easy to hard
code it in #python #perl #lisp #haskell before seeing answer
1, Script to Check HTML File Size
http://xahlee.info/python/check_html_size.html
2, Web Crawler
http://xahlee.info/python/python_simple_web_crawler.html
3, Construct a Tree Given Its Edges
http://xahlee.info/python/python_construct_tree_from_edge.html