Half a bee

When you’re writing Python tutorials, you have to use Monty Python references. It’s the law. On the 40th anniversary of the release of Monty Python’s Life of Brian, I wanted to share this example that I made for collections.defaultdict that doesn’t fit in the tutorial I’m writing. It comes as homage to the single Eric the Half a Bee.

from collections import defaultdict

class HalfABee:
    def __init__(self):
        self.is_a_bee = False
    def value(self):
        self.is_a_bee = not self.is_a_bee
        return "Is a bee" if self.is_a_bee else "Not a bee"

>>> eric = defaultdict(HalfABee().value, {})
>>> print(eric['La di dee'])
Is a bee
>>> print(eric['La di dee'])
Not a bee

Dictionaries that can return different values for the same key are a fine example of Job Security-Driven Development.

Pythonicity

The same community that says:

There should be one– and preferably only one –obvious way to do it.

Also says:

So essentially when someone says something is unpythonic, they are saying that the code could be re-written in a way that is a better fit for pythons coding style.