move 'chunks' to trezor.utils

src/tests/test_wire.py

@@ -6,11 +6,7 @@ import unittest
 from trezor import loop
 from trezor import msg
 from trezor.wire import read_wire_msg, write_wire_msg
-
-
-def chunks(l, n):
-    for i in range(0, len(l), n):
-        yield l[i:i + n]
+from trezor.utils import chunks
 
 
 class TestWire(unittest.TestCase):

src/trezor/utils.py

@@ -29,3 +29,7 @@ def unimport_gen(gen):
                 del sys.modules[to_remove]
         return ret
     return inner
+
+def chunks(l, n):
+    for i in range(0, len(l), n):
+        yield l[i:i + n]