implement randomize functionality for bruteforce2

bruteforce2.py

@@ -1,11 +1,12 @@
 import sys
 import itertools
-from util import xmlfiletodict, get_pallet, get_articles, product_varlength
+from util import xmlfiletodict, get_pallet, get_articles, product_varlength, starmap
 from arrange_spread2 import arrange_in_layer, spread_articles
 import cPickle
 from binascii import b2a_base64
 import zlib
 import os
+import random
 
 def rotate(node):
     if node is None:
@@ -97,9 +98,20 @@ def main():
     else:
         max_iter = -1
 
+    if os.environ.get("randomize"):
+        try_random = bool(int(os.environ["randomize"]))
+    else:
+        try_random = False
+
     if try_rot_article and try_rot_pallet:
+        if try_random:
+            product_it = starmap(random.randint, itertools.repeat((0,3)))
+        else:
             product_it = product_varlength(4)
     elif try_rot_article or try_rot_pallet:
+        if try_random:
+            product_it = starmap(random.randint, itertools.repeat((0,1)))
+        else:
             product_it = product_varlength(2)
 
     i = 0

util.py

@@ -199,6 +199,20 @@ def product_varlength(branch_factor):
                 else:
                     current = current["parent"]
 
+# cannot use itertools.cycle as it doesnt allow to send() to it
+def cycle(iterable):
+    saved = []
+    for element in iterable:
+        yield element
+        saved.append(element)
+    while saved:
+        for element in saved:
+              yield element
+
+# cannot use itertools.starmap as it doesnt allow to send() to it
+def starmap(function, iterable):
+    for args in iterable:
+        yield function(*args)
 
 if __name__ == "__main__":
     it = product_var_repeat(3)