Flashcards for Python lesson 3: Randomness and counting
Read the front, say the back to yourself, then open the card.
np.random.default_rng(seed)
A random number generator; the same seed gives the same numbers.
array < 0.5
An array of True and False; True counts as 1 when you add.
np.bincount(xs)
How many times each whole number 0, 1, 2, … appears in xs.
[f(i) for i in k]
A list comprehension: a new list with f applied to every item of k.
comb(n, k)
The number of ways to choose k things out of n: math.comb(12, 6) is 924.