Python iterators and generators, adorners

Decorative Device

• The essence is the function
• function: Decorate other functions, that is, add additional functions for other functions
• The principle that adorners need to follow:
  • Cannot modify the decorated function
    
    • Example: There are now three functions, each of which has its own function. If you need to add a log function to each of these three functions. Or these three functions are already running online, and now you need to add some more features. Possible ways to do this:
      • Modify the source code, each function adds these features (very risky)
  • Cannot modify the calling method of the decorated function
  • The adorner is completely transparent to the function being decorated. That is, the adorner does not affect the original function at all.

Python iterators and generators, adorners