Update README.md

this is what I think would work for a chatbot

README.md

@@ -1,3 +1,47 @@
----
-license: apache-2.0
----
+---
+license: apache-2.0
+---
+from flask import Flask, render_template, request, jsonify
+
+
+from transformers import AutoModelForCausalLM, AutoTokenizer
+import torch
+
+
+tokenizer = AutoTokenizer.from_pretrained("Davlan/xlm-roberta-base-finetuned-shona")
+model = AutoModelForCausalLM.from_pretrained("Davlan/xlm-roberta-base-finetuned-shona")
+
+
+app = Flask(__name__)
+
+@app.route("/")
+def index():
+    return render_template('chat.html')
+
+
+@app.route("/get", methods=["GET", "POST"])
+def chat():
+    msg = request.form["msg"]
+    input = msg
+    return get_Chat_response(input)
+
+
+def get_Chat_response(text):
+
+    # Let's chat for 5 lines
+    for step in range(5):
+        # encode the new user input, add the eos_token and return a tensor in Pytorch
+        new_user_input_ids = tokenizer.encode(str(text) + tokenizer.eos_token, return_tensors='pt')
+
+        # append the new user input tokens to the chat history
+        bot_input_ids = torch.cat([chat_history_ids, new_user_input_ids], dim=-1) if step > 0 else new_user_input_ids
+
+        # generated a response while limiting the total chat history to 1000 tokens, 
+        chat_history_ids = model.generate(bot_input_ids, max_length=1000, pad_token_id=tokenizer.eos_token_id)
+
+        # pretty print last ouput tokens from bot
+        return tokenizer.decode(chat_history_ids[:, bot_input_ids.shape[-1]:][0], skip_special_tokens=True)
+
+
+if __name__ == '__main__':
+    app.run()