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Re: Format String: Only when value supplied

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  Re: Format String: Only when value supplied MRAB <python@mrabarnett.plus.com> - 2014-06-24 12:09 +0100

#73541 — Re: Format String: Only when value supplied

On 2014-06-24 10:18, Florian Lindner wrote:
> Hello,
>
> I have a format string like:
>
>   print "{:10} {:25} = {:6}   ({})".format(mod, name, value, description)
>
> description can be None. In this case I want to print an empty string (which
> can be achieved by replacing it with 'description or ""') and I want to omit
> the brackets. Is there a way to tell the format string to omit a part if an
> input variable is None?
>
You could strip the trailing brackets (and spaces too?) after
formatting:

     print "{:10} {:25} = {:6}   ({})".format(mod, name, value, 
description or "").rstrip("() ")

assuming, of course, that the value never ends with brackets.

> Another question: value can be bool. When I format value with just {} if
> prints True or False, when I use {:6} it prints 1 or 0. Is there a way to
> get pack to True / False?
>

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