Got rid of the array module dependency in the re module.

The re module could be used during building before array is built.

Lib/sre_compile.py

@@ -382,8 +382,7 @@ def _mk_bitmap(bits, _CODEBITS=_CODEBITS, _int=int):
 
 def _bytes_to_codes(b):
     # Convert block indices to word array
-    import array
-    a = array.array('I', b)
+    a = memoryview(b).cast('I')
     assert a.itemsize == _sre.CODESIZE
     assert len(a) * a.itemsize == len(b)
     return a.tolist()