fix substitute

Author: samuelcolvin

devtools/debug.py

@@ -90,7 +90,7 @@ def __repr__(self) -> str:
 class Debug:
     output_class = DebugOutput
     complex_nodes = (
-        ast.Call, ast.Attribute,
+        ast.Call, ast.Attribute, ast.Subscript,
         ast.IfExp, ast.BoolOp, ast.BinOp, ast.Compare,
         ast.DictComp, ast.ListComp, ast.SetComp, ast.GeneratorExp
     )

tests/test_expr_render.py

@@ -22,6 +22,16 @@ def test_simple():
     ) == s
 
 
+def test_subscription():
+    a = {1: 2}
+    v = debug.format(a[1])
+    s = re.sub(':\d{2,}', ':<line no>', str(v))
+    assert (
+        'tests/test_expr_render.py:<line no> test_subscription\n'
+        '    a[1]: 2 (int)'
+    ) == s
+
+
 def test_exotic_types():
     aa = [1, 2, 3]
     v = debug.format(