language/RandomScan: automatic seed by default

m-labs · May 23, 2016 · aa26b13 · aa26b13
1 parent 42c84e0
commit aa26b13
Showing 1 changed file with 7 additions and 3 deletions.
diff --git a/artiq/language/scan.py b/artiq/language/scan.py
@@ -18,7 +18,7 @@
 Scan objects are supported both on the host and the core device.
 """
 
-from random import Random, shuffle
+import random
 import inspect
 
 from artiq.language.core import *
@@ -89,12 +89,16 @@ def describe(self):
 class RandomScan(ScanObject):
     """A scan object that yields a fixed number of randomly ordered evenly
     spaced values in a range."""
-    def __init__(self, start, stop, npoints, seed=0):
+    def __init__(self, start, stop, npoints, seed=None):
         self.start = start
         self.stop = stop
         self.npoints = npoints
         self.sequence = list(LinearScan(start, stop, npoints))
-        shuffle(self.sequence, Random(seed).random)
+        if seed is None:
+            rf = random.random
+        else:
+            rf = Random(seed).random
+        random.shuffle(self.sequence, rf)
 
     @portable
     def __iter__(self):