Hi,
There is a typo in your code: it should be "from_meijerg" instead of
"from_meijer":
sage: from sympy.holonomic.holonomic import from_meijerg
sage: from_meijerg?
Signature: from_meijerg(func, x0=0, evalf=False, initcond=True, domain=QQ)
Docstring:
Converts a Meijer G-function to Holonomic. "func" is the G-Function
and "x0" is the point at which initial conditions are required.
>>> from sympy.holonomic.holonomic import from_meijerg,
DifferentialOperators
>>> from sympy import symbols, meijerg, S
>>> x = symbols('x')
>>> from_meijerg(meijerg(([], []), ([S(1)/2], [0]), x**2/4))
HolonomicFunction((1) + (1)*Dx**2, x, 0, [0, 1/sqrt(pi)])
Init docstring: x.__init__(...) initializes x; see help(type(x)) for
signature
File: ~/sage/8.1/local/lib/python2.7/site-packages/sympy/holonomic/holonomic
.py
Type: function
Best wishes,
Eric.
Le vendredi 13 avril 2018 00:06:17 UTC+2, Raymond Rogers a écrit :
>
> The sympy documentation
> http://docs.sympy.org/latest/modules/holonomic/convert.html
> has the function from_meiljer and I do
> from sympy import *
> from sympy.holonomic.holonomic import from_hyper, from_meijer,
> DifferentialOperators
> (I think redundant)
> I get: "ImportError: cannot import name from_meijer"
> Is this a versioning error or what?
>
>
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