What is memoization and how can I use it in Python?

Question

I just started Python and I\'ve got no idea what memoization is and how to use it. Also, may I have a simplified example?

Answer 1

Memoization is keeping the results of expensive calculations and returning the cached result rather than continuously recalculating it.

Here's an example:

def doSomeExpensiveCalculation(self, input):
    if input not in self.cache:
        
        self.cache[input] = result
    return self.cache[input]

A more complete description can be found in the wikipedia entry on memoization.