beginning programming with python for dummies update(function upper(function usb (universal serial bus) usefulmodules site user access control (uac) user input - user interfaces * \ escape sequence - option - option valueerror exception variables assigning values class - defined determining type of instance - returning data from functions verbose mode version control - --version option vertical tab character virtualenv - visual basic vms (virtual memory system) - option *ww schools site - warning level web programming while statements nesting - overview - using - whitespaceremoving widgets library winsound module with statement writerow(function writing data to files - * \ escape sequence - option - option xml (extensible markup language) - *yyahoo! year value yellow dog linux youtube *zzero-based indexes zerodivisionerror exception zeroespadding with zfill(function zip files zope /os