> Date: Thu, 3 Jul 2008 10:18:23 +0100 > From: "Alan Gauld" <[EMAIL PROTECTED]> > Subject: Re: [Tutor] Question about string > To: tutor@python.org > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; format=flowed; charset="iso-8859-1"; > reply-type=original > > > "Dong Li" <[EMAIL PROTECTED]> wrote > > > I am new to python, so what I ask may be so basic. I don't know the > > difference between > > > > s = 'a' 'b' > > and > > s = 'a'+'b' > > > > They have the same results. Thanks for relying! > > I think the differencec is that the first is purely a syntax thing so > the interpreter does the work of joining the strings together before > processing the result as a single string whereas the second the > two strings are treated separately and actual string addition > (concatenation) is done which is a much more expensive > operation in terms of computer power. > > The first is only possible if you have literal strings but the second > can be used for variables: > > s1 = 'a' > s2 = 'b' > s = s1 s2 # doesn't work > s = s1 + s2 # works > > HTH, > > -- > Alan Gauld > Author of the Learn to Program web site > http://www.freenetpages.co.uk/hp/alan.gauld >
> ------------------------------ > Date: Thu, 3 Jul 2008 09:53:07 +0000 > From: "Monika Jisswel" <[EMAIL PROTECTED]> > Subject: Re: [Tutor] Question about string > To: tutor@python.org > Message-ID: > <[EMAIL PROTECTED]> > Content-Type: text/plain; charset="iso-8859-1" > > Python is one of the smartest languages, it does many things for the > programmer (I don't know but this might be what they mean with > Batteries-Included) , & you have just scratched the surface of it, here > python concatenated your strings together for you, later you will meet list > comprehention & other stuff that actually does most of the programing logic > for you for free. > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://mail.python.org/pipermail/tutor/attachments/20080703/9c54d12a/attachment-0001.htm> > > ------------------------------ Thank you for excellent explanations! I have been attracted by python more and more! _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
