Python: Learn Python (Advanced) in 7 Days and Ace It Well. Hands On Challenges INCLUDED! (Python Programming Book Series 2) by Ronald Olsen

Author:Ronald Olsen [Olsen, Ronald]
Language: eng
Format: azw3
Tags: Data Analysis, Python, Python programming, Computer programming, Learn coding, Machine Learning
Publisher: AUVA PRESS
Published: 2017-06-26T04:00:00+00:00

Solution for Challenge 8

def memoize(func):

func.cache = {}

def wrapper(n):

try:

ans = func.cache[n]

except KeyError:

ans = func.cache[n] = func(n)

return ans

return wrapper

@conceptualize

def myfibonacci(n):

"""

>>> print(myfibonacci.cache)

{}

>>> myfibonacci(1)

1

>>> myfibonacci(2)

1

>>> myfibonacci(10)

55

>>> myfibonacci.cache[10]

55

>>> myfibonacci(40)

102334155

"""

assert n >= 0

if n < 2:

return n

else:

return myfibonacci(n-1) + myfibonacci(n-2)

Chapter 8

Python Descriptors

This chapter explores Python descriptors, their syntax, how they are called and several built-in Python descriptors, including the functions, the properties, and the static methods. Let’s jump right in.

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