debug statements hook works for non-utf8 files

pre_commit_hooks/debug_statement_hook.py

@@ -35,7 +35,7 @@ class ImportStatementParser(ast.NodeVisitor):
 
 def check_file_for_debug_statements(filename):
     try:
-        ast_obj = ast.parse(open(filename).read(), filename=filename)
+        ast_obj = ast.parse(open(filename, 'rb').read(), filename=filename)
     except SyntaxError:
         print('{} - Could not parse ast'.format(filename))
         print()