eratosthenes prime test exercise

python/sieve/sieve.py

@@ -0,0 +1,7 @@
+def primes(limit):
+    v = [False] * 2 + [True] * (limit+1)
+    for (i, prime) in enumerate(v):
+        if prime:
+            for x in range(i * i, limit+1, i):
+                v[x] = False
+    return [x for x, y in enumerate(v) if y and x <= limit]