a *= b not equivalent to a = a*b
Jussi Piitulainen
jussi.piitulainen at helsinki.fi
Fri Aug 26 02:32:14 EDT 2016
mlz writes:
> I've been playing with the binomial function, and found that in the
> below code, rs *= x does not behave the same way as rs = rs * x. When
> I set FAIL to True, I get a different result. Both results are below.
>
> I had read that the two were equivalent. What am I missing?
You don't really have rs * x on the right-hand side. You have (rs * x)/y
where rs * x is always divisible by y but x alone is not.
For the record, your actual statement was rs = rs * (n-(i-1))/i, and you
are using Python 2 where / denotes integer division.
Try 3 * 4/6 and 3 * (4/6).
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