fixed load from spaces + added test (#1636)

* fixed load from spaces + added test

* formatting

* removed print

gradio/blocks.py

@@ -288,6 +288,7 @@ class Blocks(BlockContext):
     @classmethod
     def from_config(cls, config: dict, fns: List[Callable]) -> Blocks:
         """Factory method that creates a Blocks from a config and list of functions."""
+        config = copy.deepcopy(config)
         components_config = config["components"]
         original_mapping: Dict[int, Block] = {}
 
@@ -325,6 +326,7 @@ class Blocks(BlockContext):
                 targets = dependency.pop("targets")
                 trigger = dependency.pop("trigger")
                 dependency.pop("backend_fn")
+                dependency.pop("documentation", None)
                 dependency["inputs"] = [
                     original_mapping[i] for i in dependency["inputs"]
                 ]

test/test_blocks.py

@@ -88,6 +88,23 @@ class TestBlocks(unittest.TestCase):
         config.pop("version")  # remove version key
         self.assertTrue(assert_configs_are_equivalent_besides_ids(XRAY_CONFIG, config))
 
+    def test_load_from_config(self):
+        def update(name):
+            return f"Welcome to Gradio, {name}!"
+
+        with gr.Blocks() as demo1:
+            inp = gr.Textbox(placeholder="What is your name?")
+            out = gr.Textbox()
+
+            inp.submit(fn=update, inputs=inp, outputs=out, api_name="greet")
+
+            gr.Image().style(height=54, width=240)
+
+        config1 = demo1.get_config_file()
+        demo2 = gr.Blocks.from_config(config1, [update])
+        config2 = demo2.get_config_file()
+        self.assertTrue(assert_configs_are_equivalent_besides_ids(config1, config2))
+
     @pytest.mark.asyncio
     async def test_async_function(self):
         async def wait():