It could be Python3, indeed. I see, on "pure" sage 9.0 python3:
>>> import mpmath
>>> mpmath.mp.prec = 1000 #on 700 all is ok
>>> mpmath.findroot(lambda x: x**2 - 3, 2) # must use ** for exponentiation -
>>> pure Python
OverflowError: Python int too large to convert to C long
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "sage/libs/mpmath/ext_main.pyx", line 1690, in
sage.libs.mpmath.ext_main.mpf_base.__repr__
(build/cythonized/sage/libs/mpmath/ext_main.c:21294)
File
"/home/scratch2/dimpase/sage/sage/local/lib/python3.7/site-packages/mpmath/libmp/libmpf.py",
line 1242, in to_str
sign, digits, exponent = to_digits_exp(s, dps+3)
File
"/home/scratch2/dimpase/sage/sage/local/lib/python3.7/site-packages/mpmath/libmp/libmpf.py",
line 1200, in to_digits_exp
digits = numeral(sd, base=10, size=dps)
File
"/home/scratch2/dimpase/sage/sage/local/lib/python3.7/site-packages/mpmath/libmp/libintmath.py",
line 158, in numeral_python
A, B = divmod(n, base**half)
SystemError: <built-in function divmod> returned a result with an error set
On Tue, Jan 14, 2020 at 10:55 AM Eric Gourgoulhon
<egourgoul...@gmail.com> wrote:
>
> Le mardi 14 janvier 2020 11:36:44 UTC+1, Dima Pasechnik a écrit :
>>
>>
>> mpmath version on Sage 8.6 is 1.0.0, and later and now it is 1.1.0
>>
>> This might explain the problem, which maybe should be reported upstream:
>>
>> https://github.com/fredrik-johansson/mpmath
>>
>
>
> It's OK with Sage 8.9, which has already mpmath 1.1.0. So the problem is not
> due to the version of mpmath. Maybe a Python 2 / Python 3 issue?
> Another data point: the issue is there in Sage 9.0.beta5 (Python 3).
>
> Eric.
>
>
> --
> You received this message because you are subscribed to the Google Groups
> "sage-support" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to sage-support+unsubscr...@googlegroups.com.
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/sage-support/5d8b20d9-66b7-41e8-af08-6e3c82374856%40googlegroups.com.
--
You received this message because you are subscribed to the Google Groups
"sage-support" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to sage-support+unsubscr...@googlegroups.com.
To view this discussion on the web visit
https://groups.google.com/d/msgid/sage-support/CAAWYfq1MPr-m6X%2Bi_JH02Ja%3D9CEAx2j%3DwmzHzmhJKtP8LPierw%40mail.gmail.com.
