If you look at summation.py (inside the concrete directory), you'll see that there's an _eval_derivative function. What summation.py needs to evaluate integrals is the corresponding function for integrals, _eval_integral. Look at integrals.py and some of the other classes that implement it. It should be pretty straightforward to implement.

I hope that helps.

Cheers,

Tim.

On 16 Aug 2014, at 11:41, Gaurav Dhingra wrote:

It's really silly but may i know that " am i supposed to write some code for this issue". I am new to sympy. I have been through the tutorial of
sympy http://docs.sympy.org/latest/tutorial/ ..
and also suggest some method to solve this paricular issue.

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