feat: support gradio client with modelz endpoints (#37)

* feat: support gradio client with modelz endpoints

Signed-off-by: Kaiyang-Chen <kaiyang-chen@sjtu.edu.cn>

* doc: gradio client

Signed-off-by: Kaiyang-Chen <kaiyang-chen@sjtu.edu.cn>

* doc

Signed-off-by: Kaiyang-Chen <kaiyang-chen@sjtu.edu.cn>

---------

Signed-off-by: Kaiyang-Chen <kaiyang-chen@sjtu.edu.cn>

README.md

@@ -15,3 +15,37 @@ modelz --help
 ```shell
 echo "cute cat" | modelz inference $PROJECT --serde msgpack --write-file cat.jpg --read-stdin
 ```
+
+
+
+## Gradio Client on Modelz Endpoints
+
+We provide a lightweight Python library that makes it very easy to use any Gradio app served on modelz as an API. The functionalities of `GradioClient` are completely identical to `Client` in  `gradio_client` library provided by Gradio. The only difference is that when initializing the client, you should enter your Modelz serving endpoint URL instead of a Hugging Face space.
+
+### Example Usage
+
+```python
+from modelz import GradioClient as Client
+
+# Parameter here is the endpoint of your Modelz deployment
+# The format is like https://${DEPOLOYMENT_KEY}.modelz.io/
+cli = Client("https://translator-th85ze61tj4n3klc.modelz.io/")
+
+cli.view_api() 
+# >> Client.predict() Usage Info
+# ---------------------------
+# Named API endpoints: 1
+
+#  - predict(text, api_name="/predict") -> output
+#     Parameters:
+#      - [Textbox] text: str 
+#     Returns:
+#      - [Textbox] output: str 
+
+
+cli.predict("hallo", api_name="/predict")
+# >> "Bonjour."
+
+
+```
+

modelz/__init__.py

@@ -1,5 +1,7 @@
 from .client import ModelzClient
+from .gradio_client import GradioClient
 
 __all__ = [
     "ModelzClient",
+    "GradioClient",
 ]

modelz/gradio_client.py

@@ -0,0 +1,23 @@
+from gradio_client import Client
+
+from modelz.env import EnvConfig
+
+config = EnvConfig()
+
+
+class GradioClient:
+    """Create a Gradio Client with Modelz endpoints.
+    Args:
+        host: Modelz host address
+    """
+
+    def __init__(
+        self,
+        host: str = None,
+    ) -> None:
+        self.host = host if host else config.host
+        self._client = Client(self.host)
+
+    def __getattr__(self, attr):
+        """Delegate access to implement the composition."""
+        return getattr(self._client, attr)