Mark Dickinson <dicki...@gmail.com> added the comment:
One quibble with Raymond's response:
> 2) Your use case is trivially solved in a portable, trivial, and readable >
> way:
>
> a == int(a)
For Decimal, I'd recommend using `a == a.to_integral_value()` instead. Using
`a == int(a)` will be inefficient if `a` has large exponent, so it's not a good
general-purpose solution (though it's probably good enough in most real-world
cases).
Here's an extreme example:
In [1]: import decimal
In [2]: x = decimal.Decimal('1e99999')
In [3]: %timeit x == int(x)
1.42 s ± 6.27 ms per loop (mean ± std. dev. of 7 runs, 1 loop each)
In [4]: %timeit x == x.to_integral_value()
230 ns ± 2.03 ns per loop (mean ± std. dev. of 7 runs, 1000000 loops each)
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<https://bugs.python.org/issue26680>
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