How can I format the string according to its length at runtime?

[Bjorn Pettersen]

> From: ed_tsang at yahoo.com [mailto:ed_tsang at yahoo.com]
> 
> I am trying to supply the precision formating at run time:
> 
> s = 123
> print '(0x%-6X -)'%s
> 
> where I try to dynamically supply the number 6 from (6- length of s), 
> I can't find a way to dynamically supply that. 

Use the * specifier

>>> s = 123
>>> '(0x%-*d)' % (6, s)
'(0x123   )'
>>>

-- bjorn