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)