def _update_B(self):
for param in self.freeparams:<EOL><INDENT>if param == '<STR_LIT>':<EOL><INDENT>continue<EOL><DEDENT>paramval = getattr(self, param)<EOL>assert isinstance(paramval, float), "<STR_LIT>"<EOL>self.B[param] = broadcastMatrixMultiply(self.Ainv,<EOL>broadcastMatrixMultiply(self.dPxy[param], self.A))<EOL><DEDENT>
Update `B`.