creating your own kinds of objects (writing classes inheritancebuilding new classes derived from existing classes python list indexing and slicingboth to read and change parts of lists other syntax used with loopsbreakcontinueand else exception handling python' variable length parameter listsand other options in parameter lists list comprehensionsa concisereadablefast pythonic way to make new lists from old ones event handling in graphical programming listingmoving and deleting stored filescreating folders recursion (not special to python) powerful programming technique where functions call themselves beyond these language featurespython has vast collection of useful modules for examplei wrote real-world programsakaihw pythat have in regular use for processing large numbers of files submitted to sakai in homework submissions it uses string methods and slicing and both kinds of loopsas well is illustrating some useful components in modules sysosand os pathfor accessing command line parameterslisting file directoriescreating foldersand moving and renaming files summary comparison operators produce boolean result (type booleither true or false)[more conditional expressions (page )meaning less than greater than less than or equal greater than or equal equals not equal math symbol <>python symbols <>=!comparisons may be chained as in < ! (page )[multiple tests and if-elif statements the in operator[arbitrary types treated as boolean (page )value in sequence is true if value is one of the elements in the sequence operators on boolean expressions [compound boolean expressions (page )(acondition and condition true only if both conditions are true (bcondition or condition true only if at least one condition is true (cnot condition true only when condition is false this description is sufficient if the result is used as boolean value (in an if or while conditionsee arbitrary types treated as boolean (page for the advanced use when operands are not explicitly booleanand the result is not going to be interpreted as boolean summary