How can one exclude species from being processed in a doit()

[Dzhelil Rufat]

The documentation says:

doit(**hints)

Evaluate objects that are not evaluated by default like limits, integrals, sums and products. All objects of this kind will be evaluated recursively, unless some species were excluded via ‘hints’ or unless the ‘deep’ hint was set to ‘False’.

http://docs.sympy.org/0.7.1/modules/core.html#sympy.core.basic.Basic.doit

What is the correct way to exclude things from being processed in doit? Say in the expressions below

expr = ( Sum(k, (k, 0, 10)) + Integral(x, (x, 0, 2) ).doit()

I want doit to evaluate only the Integral and not the Sum. So that the result is equivalent to

expr = ( Sum(k, (k, 0, 10)) + Integral(x, (x, 0, 2).doit() )

Is there a way to do that?

Trying the obvious

expr.doit(Sum=False)

does not work.

Dzhelil

[Aaron Meurer]

This apparently isn't widely supported. The only one I found was
doit(integrals=False) disables integrals. It probably ought to use the
syntax you suggest.

Aaron Meurer

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