Choose a random element from a non-empty sequence

Choice : Choose a random element from a non-empty sequence.

Choices : Return a k sized list of population elements chosen with replacement.
If the relative weights or cumulative weights are not specified,
the selections are made with equal probability.

Randint : Return random integer in range [a, b], including both end points.

Randrange : Choose a random item from range(start, stop[, step]).
This fixes the problem with randint() which includes the
endpoint; in Python this is usually not what you want.

Random : random() -> x in the interval [0, 1).