fix export

Signed-off-by: youkaichao <youkaichao@gmail.com>

depyf/explain/patched_lazy_format_graph_code.py

@@ -30,7 +30,6 @@ def patched_lazy_format_graph_code(name, gm, maybe_id=None, **kwargs):
     src = "from __future__ import annotations\nimport torch\n" + \
         gm.print_readable(print_output=False)
     src = src.replace("<lambda>", "GraphModule")
-    print(src)
     try:
         compile(src, "noname", "exec")
     except Exception as e:
@@ -50,7 +49,11 @@ def patched_lazy_format_graph_code(name, gm, maybe_id=None, **kwargs):
         scope = fn.__globals__
         exec(compile(src, filename=new_filepath, mode="exec"), scope)
         if use_gm:
-            fn.__code__ = getattr(scope["GraphModule"], fn.__name__).__code__
+            import torch
+            classes = [v for v in scope.values() if isinstance(v, type) and issubclass(v, torch.nn.Module)]
+            assert len(classes) == 1
+            module_class = classes[0]
+            fn.__code__ = getattr(module_class, fn.__name__).__code__
         else:
             fn.__code__ = scope[fn.__name__].__code__
             del scope[fn.__name__]