System Error

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Paul Royik

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Jun 9, 2015, 12:15:17 PM6/9/15

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SystemError: Parent module 'sympy.core' not loaded, cannot perform relative import

When I try to run the following:

expr=sqrt(pi)*(sqrt(2)*(1 - I)*erf(sqrt(-I)) + sqrt(2)*(-1 + I)*erf(sqrt(2)*(-1/2 + I/2)) + sqrt(2)*(1 + I)*erf((-1)**(1/4)) + sqrt(2)*(1 + I)*erf(sqrt(2)*(1/2 + I/2)))/16

expr.round(15)

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