[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).
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