Added support for bytes in sliced __setitem__

Author: Léo Flaventin Hauchecorne

intelhex/__init__.py

@@ -480,8 +480,10 @@ def __setitem__(self, addr, byte):
                 raise TypeError('Address should be >= 0.')
             self._buf[addr] = byte
         elif t == slice:
+            if isinstance(byte, bytes) :
+                byte = list(byte)
             if not isinstance(byte, (list, tuple)):
-                raise ValueError('Slice operation expects sequence of bytes')
+                raise ValueError('Slice operation expects a bytes or a sequence of byte values')
             start = addr.start
             stop = addr.stop
             step = addr.step or 1

intelhex/test.py

@@ -687,10 +687,12 @@ def setitem(a,b):
         ih = IntelHex()
         ih[0:8:2] = range_l(4)
         self.assertEqual({0:0, 2:1, 4:2, 6:3}, ih.todict())
+        ih[0:8:2] = b'\xDE\xAD\xBE\xEF'
+        self.assertEqual({0:0xDE, 2:0xAD, 4:0xBE, 6:0xEF}, ih.todict())
         # errors in slice operations
         # ih[1:2] = 'a'
         self.assertRaisesMsg(ValueError,
-            'Slice operation expects sequence of bytes',
+            'Slice operation expects a bytes or a sequence of byte values',
             setitem, slice(1,2,None), 'a')
         # ih[0:1] = [1,2,3]
         self.assertRaisesMsg(ValueError,