Hey guys, when i add interesting vector import my code, i display that error : *TypeError: unsupported operand type(s) for +=: 'NoneType' and 'NoneType'*
from sympy.vector import CoordSys3D, curl, divergence, gradient from sympy.vector import * -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/6b8c447a-f0b3-4e18-88c6-c46a83d3429an%40googlegroups.com.
