converting to sympy

Anonymous

1917 ●30 ●51 ●83

Dear All

I would like to convert a sage equation to sympy, eg

x=var('x')
y=2*x+Ei(x)
y._sympy_()

... and get complains that Ei is not defined in sympy.

How can I define a (possibly fake) Ei function in sympy from sage? Or is there any other way to avoid the problem?

Thanks

Valery

2 Answers

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You can also use sympify:

sage: x = var('x')
sage: y = 2 * x + Ei(x)
sage: import sympy
sage: sympy.sympify(y)
2*x + Ei(x)
sage: type(_)
<class 'sympy.core.add.Add'>

5125 ●3 ●43 ●111

This works now (in sage 6.3.beta6).

sage: x = var('x')
sage: y = 2 * x + Ei(x)
sage: y._sympy_()
2*x + Ei(x)

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