examples ||in the preceding section we learned enough python to write real programs in this section we will study two complete programs that use only the python covered earlier this is both to show what is possibleand to help consolidate what has been learned so far in subsequent we will increasingly cover more of python' language and libraryso that we will be able to write programs that are more concise and more robust than those shown here--but first we must have the foundations on which to build |bigdigits py the first program we will review is quite shortalthough it has some subtle aspectsincluding list of lists here is what it doesgiven number on the command linethe program outputs the same number onto the console using "bigdigits at sites where lots of users share high-speed line printerit used to be common practice for each user' print job to be preceded by cover page that showed their username and some other identifying details printed using this kind of technique we will review the code in three partsthe importthe creation of the lists holding the data the program usesand the processing itself but firstlet' look at sample runbigdigits py **************************************we have not shown the console prompt (or the leading for unix users)we will take them for granted from now on import sys since we must read in an argument from the command line (the number to output)we need to access the sys argv listso we begin by importing the sys module we represent each number as list of strings for examplehere is zero