On Sat, 15 Apr 2006, Tiago Saboga wrote:
> Can I use string formatting in my own functions, or is it stuck with builtins?
> It doesn't make much sense for me, but I don't understand the following
> error:
>
> In [1]: var = 456
>
> In [2]: def printd(arg):
> ...: print('>>> %s') % arg
> ...:
Hi Tiago,
Ah! printd() is not doing what you think it's doing. Try:
#########################
def printd(arg):
print ('>>> %s' % arg)
#########################
The parenthesization you had earlier forced Python into printing out your
template before it had an opportunity to plug arg into it. You need to do
the interpolation first.
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