Hi,


I'm trying to convert expressions sympy to theano... following:


http://matthewrocklin.com/blog/work/2013/03/28/SymPy-Theano-part-2/


And I run into a failure that appears simple to fix. Here's a simple 
example:


from sympy.printing.theanocode import theano_function


im=sp.sqrt(-1)

x=sp.symbols("x")

y=x+im*x

fn_theano  = theano_function([x], [y], dims={x: 1}, dtypes={x: 'float64'})


ends with:


KeyError: <class 'sympy.core.numbers.ImaginaryUnit'>


which appears to my naive eyes to be a just a missing entry in a conversion 
map. Can someone help? 


Thanks,

Amir

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