17.9. Instances as Return Values¶
Functions and methods can return objects. This is actually nothing new since everything in Python is an object and we have been returning values for quite some time. The difference here is that we want to have the method create an object using the constructor and then return it as the value of the method.
Suppose you have a point object
and wish to find the midpoint halfway between it and some other target point. We would like to write a method, call
halfway that takes another
Point as a parameter and returns the
Point that is halfway between the point and
The resulting Point,
mid, has an x value of 4 and a y value of 8. We can also use any other methods since
mid is a
In the definition of the method
halfway see how the requirement to always use dot notation with attributes disambiguates
the meaning of the attributes
We can always see whether the coordinates of Point
target are being referred to.
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