def setup(self):
group = Group()
a = group.declare_input('a', val=2)
b = group.create_indep_var('b', val=12)
group.register_output('prod', a * b)
self.add_subsystem('sys', group, promotes=['*'])
# These expressions do not lead to constructing any Component
# objects
x1 = self.declare_input('x1')
x2 = self.declare_input('x2')
y1 = x2 + x1
y2 = x2 - x1
y3 = x1 * x2
y5 = x2**2
def setup(self):
# Create independent variable
x1 = self.create_indep_var('x1', val=40)
# Powers
y4 = x1**2
# Create subsystem that depends on previously created
# independent variable
subgroup = Group()
# This value is overwritten by connection from the main group
a = subgroup.declare_input('x1', val=2)
b = subgroup.create_indep_var('x2', val=12)
subgroup.register_output('prod', a * b)
self.add_subsystem('subsystem', subgroup, promotes=['*'])
# declare inputs with default values
# This value is overwritten by connection
# from the subgroup
x2 = self.declare_input('x2', val=3)
# Simple addition
y1 = x2 + x1
self.register_output('y1', y1)
# Simple subtraction
self.register_output('y2', x2 - x1)
# Simple multitplication
self.register_output('y3', x1 * x2)
# Powers
y5 = x2**2
# register outputs in reverse order to how they are defined
self.register_output('y5', y5)
self.register_output('y6', y1 + y5)
self.register_output('y4', y4)