Kivy Cookbook

Declaring properties within a class

Here we want to highlight an important difference between traditional Python coding and Kivy, and the usefulness of this change.

Getting ready

We need to remember the traditional form to declare properties in Python. Usually, if we want to declare a property in Python, we do something such as:

class MyClass(object):
    def __init__(self):
        super(MyClass,self).__init__()
        self._numeric_var = 1
@property
    def numeric_var(self): 
        return self._numeric_var

We are declaring a numeric one, whereas if we use MyClass().numeric_var in the Python shell, we get 1 in return.

How to do it…

Now, to declare this property in Kivy we follow these steps:

1. Import Kivy and its properties
2. Define the class
3. Reference the Kivy property, in this case ...