[Python-Dev] A Horrible Inconsistency
Georg Brandl
g.brandl at gmx.net
Thu May 25 23:45:00 CEST 2006
Tim Peters wrote:
> [Raymond Hettinger]
> ...
>> Also, I'm not clear on the rationale for transforming negative
>> repetition counts to zero instead of raising an exception.
>
> There are natural use cases. Here's one: you have a string and want
> to right-justify it to 80 columns with blanks if it's shorter than 80.
>
> s = " " * (80 - len(s)) + s
>
> does the right thing in all cases, because the blank repetition
> gracefully collapses to an empty string whenever len(s) >= 80. I've
> used that (and variants thereof) dozens of times. Then again, I don't
> believe I've ever used the "integer * sequence" form (i.e., with the
> integer on the left).
I originally brought that up because decimal.py uses it.
(try to translate this to C code...)
Georg
More information about the Python-Dev
mailing list