Rational(numpy.int64(1), 2)) fails on Python 3: TypeError: invalid input: 1

[nschloe]

MWE:

import numpy
import sympy

sympy.Rational(numpy.int64(1), 2)

This fails with

[...]
/usr/lib/python3/dist-packages/sympy/core/numbers.py in __new__(cls, p, q, gcd)
   1483 
   1484             if not isinstance(p, SYMPY_INTS + (Rational,)):
-> 1485                 raise TypeError('invalid input: %s' % p)
   1486             q = q or S.One
   1487             gcd = 1

TypeError: invalid input: 1

on Python 3, SymPy 1.1.1.

Also failing:

• numpy.int32

Working:

• Anything on Python 2.
• numpy.int

[abhigyank]

There seems to be no update on this issue since 1 month, so I am taking this up. No update on PR #13670 from 1 month as well.

[nschloe]

Not sure if this is the same issue:

from mpmath import mp
import numpy

mp.sqrt(numpy.int64(1))

fails with

TypeError: cannot create mpf from 1

under Python 3. Should I file a new bug for this?

[normalhuman]

I think you should file an issue at https://github.com/fredrik-johansson/mpmath/issues since it does not involve SymPy. mpmath is not a part of SymPy, it's just a dependency.

[oscarbenjamin]

This seems to be fixed now. I'll close - feel free to open if it doesn't seem fixed to you:

In [1]: import numpy 
   ...: import sympy 
   ...:  
   ...: sympy.Rational(numpy.int64(1), 2)                                                                                         
Out[1]: 1/2