Oh, I see! It's a little stupid question :) Thanks,Alan! On 6/6/11, Alan Gauld <alan.ga...@btinternet.com> wrote: > "Ryan Wu" <seasider...@gmail.com> wrote > >> I am a newbie of python, and reading 'python essential reference'. >> >> Now I want to print this results >> 'a is %d' % a -> a is 42 >> >> with the code >> >> a = 42 >>> test = "'a is %d' % a" > > test is now a literal string > >>> print( '%20s ->' % test, test) > > And this inserts the literal string into the format string then > prints the literal string > > What I think you wanted to do is: > >>>> a = 42 >>>> test = 'a is %d' > >>>> print( '%20s -> %s' % (test, test % a) ) > >> What is the difference of print(test) and print ( 'a is %d' % a )? > > In test you have the a inside the string delimiters so it is part > of the string. In the second case a is outside the string and > gets evaluated as a variable > > HTH, > > -- > Alan Gauld > Author of the Learn to Program web site > http://www.alan-g.me.uk/ > > > _______________________________________________ > Tutor maillist - Tutor@python.org > To unsubscribe or change subscription options: > http://mail.python.org/mailman/listinfo/tutor >
-- ---- Ryan Wu _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
