Allow gr.load to work inside gr.Blocks automatically (#8579)

* load-in-blocks

* allow gr.load inside gr.Blocks

* add changeset

* add changeset

---------

Co-authored-by: gradio-pr-bot <gradio-pr-bot@users.noreply.github.com>

.changeset/quick-dolls-admire.md

@@ -0,0 +1,5 @@
+---
+"gradio": patch
+---
+
+fix:Allow `gr.load` to work inside `gr.Blocks` automatically

gradio/blocks.py

@@ -1181,7 +1181,7 @@ def iterate_over_children(children_list):
 
         with Blocks(theme=theme) as blocks:
             # ID 0 should be the root Blocks component
-            original_mapping[0] = Context.root_block or blocks
+            original_mapping[0] = root_block = Context.root_block or blocks
 
             iterate_over_children(config["layout"]["children"])
 
@@ -1256,7 +1256,7 @@ def iterate_over_children(children_list):
                         )
                         for t in targets
                     ]
-                dependency = blocks.default_config.set_event_trigger(
+                dependency = root_block.default_config.set_event_trigger(
                     targets=targets, fn=fn, **dependency
                 )[0]
                 if first_dependency is None:

test/test_external.py

@@ -505,3 +505,9 @@ def test_load_custom_component():
         "test/test_files/sample_file.pdf", "What does this say?", api_name="predict"
     )
     assert isinstance(output, str)
+
+
+def test_load_inside_blocks():
+    demo = gr.load("spaces/abidlabs/en2fr")
+    output = demo("Hello")
+    assert isinstance(output, str)