Python 3.6.8 (default, Oct  7 2019, 12:59:55) 
[GCC 8.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from mpmath import *
>>> import numpy as np
>>> mp.legendre(1.2, np.nan)
^CTraceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/jvanover/.local/lib/python3.6/site-packages/mpmath/ctx_mp_python.py", line 1035, in f_wrapped
    retval = f(ctx, *args, **kwargs)
  File "/home/jvanover/.local/lib/python3.6/site-packages/mpmath/functions/orthogonal.py", line 363, in legendre
    return ctx.hyp2f1(-n,n+1,1,(1-x)/2, **kwargs)
  File "/home/jvanover/.local/lib/python3.6/site-packages/mpmath/functions/hypergeometric.py", line 251, in hyp2f1
    return ctx.hyper([a,b],[c],z,**kwargs)
  File "/home/jvanover/.local/lib/python3.6/site-packages/mpmath/functions/hypergeometric.py", line 226, in hyper
    if   q == 1: return ctx._hyp2f1(a_s, b_s, z, **kwargs)
  File "/home/jvanover/.local/lib/python3.6/site-packages/mpmath/functions/hypergeometric.py", line 473, in _hyp2f1
    v = _hyp2f1_gosper(ctx,a,b,c,z,**kwargs)
  File "/home/jvanover/.local/lib/python3.6/site-packages/mpmath/functions/hypergeometric.py", line 380, in _hyp2f1_gosper
    kakbz = (k+a)*(k+b)*z / (4*(k+1)*kch*(k+c1h))
  File "<string>", line 7, in __mul__
  File "/home/jvanover/.local/lib/python3.6/site-packages/mpmath/libmp/libmpf.py", line 894, in python_mpf_mul
    return normalize1(sign, man, sexp+texp, bc, prec, rnd)
  File "/home/jvanover/.local/lib/python3.6/site-packages/mpmath/libmp/libmpf.py", line 230, in _normalize1
    if not man & 1:
KeyboardInterrupt