Figure 13-6. Screenshot of traits GUI with updating (empty)
Figure 13-7 illustrates what happens with this new GUI “in action.” Providing values for
the object attributes and pushing the Update button returns the calculated discount factors
— this time within the GUI window.
The following Python code shows step-by-step the equivalent operations without a GUI.
First, the assigning of values to the attributes:
In [ 84 ]: sr.name = ‘sr_class’
sr.rate = 0.05
sr.time_list = np.array(([0.0, 0.5, 1.0, 1.5, 2.0],), dtype=np.float32)
Second, the update of the list object containing the discount factors:
In [ 85 ]: sr._update_fired()
Figure 13-7. Screenshot of traits GUI with updating (after update)
Finally, the output of the calculated/updated list with the discount factors:
