added methods to get specific hosted models from API

app.py

@@ -1,7 +1,43 @@
-from fastapi import FastAPI
+from typing import Optional
+
+from fastapi import FastAPI, HTTPException
+from pydantic import BaseModel
+
+
+class Model(BaseModel):
+    id: int
+    name: str
+    param_count: Optional[int] = None
+
 
 app = FastAPI()
 
+models = [Model(id=0, name="CNN"), Model(id=1, name="Transformer")]
+id_2_hosted_models = {
+    model.id : model for model in models
+}
+model_names_2_id = { 
+    model.name.lower() : model.id for model in models
+}
+
+
 @app.get("/")
 def greet_json():
-    return {"Hello": "World!"}
+    return {"Hello World": "Welcome to my ML Repository API!"}
+
+@app.get("/hosted/id/{model_id}")
+def get_by_id(model_id: int):
+
+    if model_id not in id_2_hosted_models:
+        raise HTTPException(status_code=404, detail=f"Model with id={model_id} not found")
+    
+    return id_2_hosted_models[model_id]
+
+@app.get("/hosted/name/{model_name}")
+def get_by_name(model_name: str):
+    model_name = model_name.lower()
+    
+    if model_name not in model_names_2_id:
+        raise HTTPException(status_code=404, detail=f"Model '{model_name}' not found")
+    
+    return id_2_hosted_models[model_names_2_id[model_name]]