ot; went to "Nan"
So, indeed, the transcript lied. I will be more careful.
-Original Message-
From: Python-list On
Behalf Of Gregory Ewing
Sent: Friday, February 15, 2019 3:51 AM
To: python-list@python.org
Subject: Re: FW: Why float('Nan') == float('Nan&#
Avi Gross wrote:
I can see why you may be wondering. You see the nan concept as having a
specific spelling using all lowercase and to an extent you are right.
No, he's talking about this particular line from the transcript you
posted:
>>>float(" nan")
> Nan
This suggests that the interpreter
On Fri, Feb 15, 2019 at 4:15 PM Avi Gross wrote:
>
> > You shouldn't be testing floats for identity.
>
> I am not suggesting anyone compare floats. I repeat that a nan is not
> anything. Now as a technicality, it is considered a float by the type
> command as there is no easy way to make an int th
', 'fromhex',
'hex', 'imag', 'is_integer', 'real']
>>> id(numpy.nan)
57329632
This time that same address is reused:
>>> m = numpy.nan
>>> id(m)
57329632
>>> n = numpy.nan
>>> id(n)
57329632
So the nu
On Fri, Feb 15, 2019 at 2:37 PM Avi Gross wrote:
> But here is a curiosity. The numpy add-on package has a nan that is UNIQUE
> so two copies are the same. Read this transcript and see if it might
> sometimes even be useful while perhaps confusing the heck out of people who
> assume all nans are t
n)
>>> numpya == numpyb
False
>>> numpya is numpyb
True
-Original Message-
From: Python-list On
Behalf Of Grant Edwards
Sent: Thursday, February 14, 2019 6:15 PM
To: python-list@python.org
Subject: Re: FW: Why float('Nan') == float('Nan') is Fal
On 2019-02-14, Avi Gross wrote:
> I experimented a bit:
>
float("nan ")
> nan
float(" nan")
> Nan
float(" nAn")
> nan
That's curious. I've never seen "Nan" before. What version of Python
are you using?
--
Grant Edwards grant.b.edwardsYow! NANCY!! Why i
Other people have replied well enough with better ways to do this but I am
stuck on WHY this was seen as a way to do this at all.
The code was:
r = float('Nan')
while r==float('Nan'):
inp = input("Enter a number\n")
try:
r = float(inp)
except ValueError:
r = float
