Merge pull request #1731 from RustPython/feature/implement-random

Implement _random.Random

tests/snippets/stdlib_random.py

@@ -0,0 +1,29 @@
+import random 
+
+random.seed(1234)
+
+# random.randint
+assert random.randint(1, 11) == 8
+
+# random.shuffle
+left = list(range(10))
+right = [2, 7, 3, 5, 8, 4, 6, 9, 0, 1]
+random.shuffle(left)
+assert left == right
+
+# random.choice
+assert random.choice(left) == 5
+
+# random.choices 
+expected = ['red', 'green', 'red', 'black', 'black', 'red']
+result = random.choices(['red', 'black', 'green'], [18, 18, 2], k=6)
+assert expected == result
+
+# random.sample
+sampled = [0, 2, 1]
+assert random.sample(list(range(3)), 3) == sampled
+
+# TODO : random.random(), random.uniform(), random.triangular(),
+#        random.betavariate, random.expovariate, random.gammavariate,
+#        random.gauss, random.lognormvariate, random.normalvariate,
+#        random.vonmisesvariate, random.paretovariate, random.weibullvariate