base for the application : support custom python application and auto-install dependencies

samples/models/python-bert-1/config.json

@@ -0,0 +1,11 @@
+{
+  "type": "python",
+  "file": "model.py",
+
+  "requirements": [
+    "transformers",
+    "torch",
+    "torchvision",
+    "torchaudio"
+  ]
+}

samples/models/python-bert-1/model.py

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+import json
+
+import torch
+import transformers
+
+
+MODEL_NAME: str = "huawei-noah/TinyBERT_General_4L_312D"
+
+
+def load(model):
+    model.model = transformers.AutoModel.from_pretrained(MODEL_NAME)
+    model.tokenizer = transformers.AutoTokenizer.from_pretrained(MODEL_NAME)
+
+def unload(model):
+    model.model = None
+    model.tokenizer = None
+
+def infer(model, payload: dict) -> str:
+    inputs = model.tokenizer(payload["prompt"], return_tensors="pt")
+
+    with torch.no_grad():
+        outputs = model.model(**inputs)
+
+    embeddings = outputs.last_hidden_state
+
+    return json.dumps({
+        "data": embeddings.tolist()
+    })