random: extract to a separate module

pqcli/random.py

@@ -0,0 +1,22 @@
+import random
+import typing as T
+
+
+def seed(seed: T.Any) -> None:
+    random.seed(seed)
+
+
+def choice(source: T.Iterable[T.Any]) -> T.Any:
+    return random.choice(source)
+
+
+def below(num: int) -> int:
+    return random.randint(0, num - 1)
+
+
+def below_low(num: int) -> int:
+    return min(below(num), below(num))
+
+
+def odds(chance: int, out_of: int) -> bool:
+    return below(out_of) < chance