Implement the method nextNum() and an effective set of deterministic unit tests.
Make sure your code is exemplary, as if it was going to be shipped as part of a production system.
As a quick check, given Random Numbers are [-1, 0, 1, 2, 3] and
Probabilities are [0.01, 0.3, 0.58, 0.1, 0.01]
if we call nextNum() 100 times we may get the following results.
As the results are random, these particular results are unlikely.
-1: 1 times
0: 22 times
1: 57 times
2: 20 times
3: 0 times
You may use random.random() which returns a pseudo random number between 0 and 1.
You can use the following structure for your code. If possible, make this structure more pythonic.
import random
class RandomGen(object):
# Values that may be returned by next_num()
_random_nums = []
# Probability of the occurence of random_nums
_probabilities = []
def next_num(self):
"""
Returns one of the randomNums. When this method is called
multiple times over a long period, it should return the
numbers roughly with the initialized probabilities.
"""