On Tue, Jun 6, 2017 at 3:01 AM, Peter Pearson <pkpearson@nowhere.invalid> wrote:
> On Fri, 2 Jun 2017 10:17:05 -0700 (PDT), sean.diza...@gmail.com wrote:
> [snip]
>>>>> print "foo %s" % 1-2
>> Traceback (most recent call last):
>> File "<stdin>", line 1, in <module>
>> TypeError: unsupported operand type(s) for -: 'str' and 'int'
>
> Others have already pointed out that you're assuming the
> wrong precedence:
>
> Say
> "foo %s" % (1-2)
> not
> ("foo %s" % 1) - 2
> .
>
> Personally I prefer a less compact but more explicit alternative:
>
> "foo {}".format(1-2)
The trouble with the zen of Python is that people now use the word
"explicit" to mean "code that I like". What is more explicit here? It
uses a method call instead of an operator, but either way, it's
completely explicit that you want to populate the placeholders in a
template string.
ChrisA
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