On Tue, 20 Jul 2010 03:07:47 am Richard D. Moores wrote: > On Mon, Jul 19, 2010 at 09:58, ALAN GAULD <alan.ga...@btinternet.com> wrote: > > Heres what I did: > > Search Google for "Python format strings" and from the first link > > click on String Formatting operations in the contents pane: > > > > http://docs.python.org/library/stdtypes.html#string-formatting-oper > >ations > > > > Read item number 4. > > "4. Minimum field width (optional). If specified as an '*' > (asterisk), the actual width is read from the next element of the > tuple in values, and the object to convert comes after the minimum > field width and optional precision." > > Now that just screams for about a dozen well-designed illustrative > examples, don't you think?
Surely it only needs one? (a) Field width known when you write the template, compared to (b) it being unknown when you write the template: >>> template = "(a) %05d | (b) %0*d" >>> template % (42, 5, 42) '(a) 00042 | (b) 00042' This is how you would do it with the asterisk: you need a meta-template to make a template. >>> meta = "(a) %%05d | (b) %%0%dd" >>> template = meta % 5 >>> template % (42, 42) '(a) 00042 | (b) 00042' -- Steven D'Aprano _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
