On Sat, Dec 28, 2019 at 2:41 AM Antoine Pitrou <solip...@pitrou.net> wrote:
> +1 for a .is_nan() method on suitable types. That's the most natural
> and elegant solution, IMHO. Tricks like "x == x" are nice when you
> *know* that x is a float or Decimal, but not in the general case.
>
agreed -- while it may work in almost all cases, what it is really checking
is whether an object compares to itself, which is not question being asked.
I suppose we could do something like:
def is_nan(num):
try:
return num.is_nan()
except AttributeError:
if isinstance(num, Number):
return not (num == num)
else:
return False
Running it on my test code, it works for everything I thought to test
except numpy arrays of size 1.
-CHB
--
Christopher Barker, PhD
Python Language Consulting
- Teaching
- Scientific Software Development
- Desktop GUI and Web Development
- wxPython, numpy, scipy, Cython
--
Christopher Barker, PhD
Python Language Consulting
- Teaching
- Scientific Software Development
- Desktop GUI and Web Development
- wxPython, numpy, scipy, Cython
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