On 1/24/10, tutor-requ...@python.org <tutor-requ...@python.org> wrote: > Send Tutor mailing list submissions to > tutor@python.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://mail.python.org/mailman/listinfo/tutor > or, via email, send a message with subject or body 'help' to > tutor-requ...@python.org > > You can reach the person managing the list at > tutor-ow...@python.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Tutor digest..." > > > Today's Topics: > > 1. Re: The magic parentheses (Shashwat Anand) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Sun, 24 Jan 2010 13:54:37 +0530 > From: Shashwat Anand <anand.shash...@gmail.com> > To: Alan Gauld <alan.ga...@btinternet.com> > Cc: tutor@python.org > Subject: Re: [Tutor] The magic parentheses > Message-ID: > <d4ab53de1001240024j3f1e48d6o1507f4e247c...@mail.gmail.com> > Content-Type: text/plain; charset="iso-8859-1" > > @David, > > Alan and rest have clarified your doubt I guess. However let me point you > towards some other mistakes. > > def area1(radius): > area1r = 3.14159 * mainvar1**2 > return area1r > print area1r > > def area2(radius): > area2r = 3.14159 * mainvar2**2 > return area2r > print area2r > > Here you created two functions for the single purpose of calculating area. > Why not just do, > def area(radius): > return math.pi * radius * radius > > Functions are created for doing repetitive tasks IMHO. But you just created > them for the heck of it. Ofcourse there is issue of writing dead-code (i.e. > lines that will never be executed), the print after return as Alan already > pointed out. > Also you created, a function that displays the difference between the two > results. > > def return_difference_of12(var1,var2): > if var1 - var2 > 0: > y = v1,var1,v3,v2,var2,period > print y > elif var2 - var1 > 0: > z = v2,var2,v3,v2,var1,period > print z > > > Why not create something simple like this : > > def return_difference(var1, var2): > if var1 > var2: > print 'Variable 1', var1, 'is greater than Variable 2', var2, '.' > elif var2 > var1: > print 'Variable 2', var2, 'is greater than Variable 1', var1, '.' > else: > print 'Variable 1', var1, 'is equal Variable 2', var2, '.' > > No need for explicit formation of tuple if all you wish is just a print > statement. > > Regards, > ~Shashwat > > > On Sun, Jan 24, 2010 at 1:23 PM, Alan Gauld > <alan.ga...@btinternet.com>wrote: > >> >> "David Hutto" <dwightdhu...@yahoo.com> wrote >> >> This is my first post to the list, so tell me if I'm posting incorrectly. >>> >> >> You are doing fine. Welcome. >> >> My problem is when the results are printed, I get this: >>> >>> >>> >>> ('Variable 2,', 490.0, 'is greater than', 'Variable 2,', 8.0, '.') >>> >> >> The parentheses, as well as the apostrophes and commas. >>> I'm sure it's the way I'm having the results printed after it's >>> through, but not sure how to correct it. >>> >> >> You have two problems in your code(at least!) >> ---------------def area2(radius): >> area2r = 3.14159 * mainvar2**2 >> return area2r >> print area2r >> --------The print statement will never be called because the return >> statement forces an exit from the function. >> ------------------------- >> def return_difference_of12(var1,var2): >> if var1 - var2 > 0: >> >> y = v1,var1,v3,v2,var2,period >> print y >> elif var2 - var1 > 0: >> z = v2,var2,v3,v2,var1,period >> print z >> ----------------------------The assignments to y and z create tuples >> (a,b,c...)So you are asking to print a tuple and Python represents tuples >> by >> putting parens around the contents.To print them as a string use the >> join() >> method of a string using an empty string:print ''.join([str(s) for s in >> y])However this is an unusual way to print this type of output,It would be >> more normal to use a format string:print "Variable2: %f id greater than >> Variable1: %f." % (var1,var2)This reduces the number of variables needed >> and >> also gives you much more control over layout because the %f markers can be >> augmented with width specifiers, justificationhints etc.You can store the >> entire format string in a variable if you wish - especiaslly if you want >> to >> use it multiple times - but in your case the strings only appear once so I >> wouldn't bother.HTH,-- Alan GauldAuthor of the Learn to Program web >> sitehttp://www.alan-g.me.uk/ >> >> _______________________________________________ >> Tutor maillist - Tutor@python.org >> To unsubscribe or change subscription options: >> http://mail.python.org/mailman/listinfo/tutor >> > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://mail.python.org/pipermail/tutor/attachments/20100124/cfa8259d/attachment.html> > > ------------------------------ > > _______________________________________________ > Tutor maillist - Tutor@python.org > http://mail.python.org/mailman/listinfo/tutor > > > End of Tutor Digest, Vol 71, Issue 62 > ************************************* >
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