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GitHub Repository: pierian-data/complete-python-3-bootcamp
 Path: blob/master/11-Python Generators/03-Iterators and Generators Homework - Solution.ipynb
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Kernel: Python 3

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Iterators and Generators Homework - Solution

Problem 1

Create a generator that generates the squares of numbers up to some number N.

def gensquares(N):
    for i in range(N):
        yield i**2

for x in gensquares(10):
    print(x)
0 1 4 9 16 25 36 49 64 81

Problem 2

Create a generator that yields "n" random numbers between a low and high number (that are inputs).
Note: Use the random library. For example:

import random

random.randint(1,10)
3
def rand_num(low,high,n):
    
    for i in range(n):
        yield random.randint(low, high)

for num in rand_num(1,10,12):
    print(num)
3 9 6 10 8 4 5 5 5 3 5 8

Problem 3

Use the iter() function to convert the string below into an iterator:

s = 'hello'

s = iter(s)

print(next(s))
h

Problem 4

Explain a use case for a generator using a yield statement where you would not want to use a normal function with a return statement.

If the output has the potential of taking up a large amount of memory and you only intend to iterate through it, you would want to use a generator. (Multiple answers are acceptable here!)

Extra Credit!

Can you explain what gencomp is in the code below? (Note: We never covered this in lecture!)

my_list = [1,2,3,4,5]

gencomp = (item for item in my_list if item > 3)

for item in gencomp:
    print(item)
4 5

Hint: Google generator comprehension!

Great Job!