On Sun, Jun 26, 2011 at 2:42 PM, Lisi <lisi.re...@gmail.com> wrote: > Thanks, Noah and Steven. :-) > > On Sunday 26 June 2011 12:24:12 Steven D'Aprano wrote: >> Lisi wrote: >> > In the following excerpt from a program in the book I am following: >> > >> > print "If I add %d, %d, and %d I get %d." % ( >> > my_age, my_height, my_weight, my_age + my_height + my_weight) >> > >> > is >> > >> > % ( >> > my_age, my_height, my_weight, my_age + my_height + my_weight) >> > >> > the/a format string? >> >> No. The format string is a string with the % codes. In this case, they >> are all %d codes: >> >> "If I add %d, %d, and %d I get %d." >> >> but there are other codes possible. >> >> The % symbol on its own is an operator, like + or * or / >> >> The part inside the brackets () is a tuple of values to insert into the >> format string. Putting the three together: >> >> >> target = "Hello %s." >> value = "Lisi" >> print target % value >> >> => prints "Hello Lisi." > > At least I had managed to pick up correctly that the format string needed a % > symbol! > > So, if I have now understood correctly, a format string is a string containing > at least one variable, and the variable(s) is/are preceded by the % symbol.
Well, sort of. Leaning more to the "no" side, but sort of. A format string is a string containing specifiers (placeholders, if you will) for values, including variables, but not the values themselves. The % symbol is a specifier. So, for example, %d specifies that something should be of type d which, in Python, is an int. The actual variables/values are the bit after the format string, and after the %. HTH. _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
