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? > > -- 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 post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.