Decorators

and

Generators

But why?

• Decorators
  • Make a bunch of functions and/or methods to do the same thing
• Generators
  • Create iterators. Vital for large data sets.
• Jobs!
  • Standard interview question
  • Once upon a time...

A quick bit of background

This may be revision, but it's important

Everything in

Python is an object

No really, everything

• Numbers
• Strings
• Instances
• Classes
• Class methods
• Functions
• Modules you've imported

Being an object in python

• Have your own doc (try doc(anything))
• Having lots of built in methods
• Most importantly for us,
  • you can be passed around and modified

What we're actually doing with generators

• A decorator is a thing* that takes a function and returns another function
• The new function will do everything the old function does, plus some other stuff 
• Every function passed through the same decorator will have the same new functionality

*it's a function, but if I said that up there it'd be confusing

Phew, that was a lot to take in,

have a cute picture