all Python 3randomterm

random.randint

integers

Returns a random integer from the range [a, b] inclusive. Both ends are included.

Syntax

random.randint(a, b)

Unlike range and randrange, the upper bound is included — hence the classic off-by-one: random.randint(0, len(items)) will eventually return len(items) and blow up the indexing, you want len(items) - 1. Never use it for passwords, tokens or anything security-related: the stream is predictable from a handful of outputs, so reach for the secrets module instead.

Examples

import random
random.seed(42)  # зерно задано — числа воспроизводимы
print(random.randint(1, 6))   # → 6 — бросок кубика, концы включены
print(random.randint(0, 100)) # → 14
print(random.randint(-10, 10)) # → -10
results = [random.randint(1, 6) for _ in range(10)]
print(results)  # → [6, 3, 2, 2, 2, 6, 1, 6, 6, 5]

See also

Open in the full glossarydocs.python.orgReport an inaccuracy