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DialoGPT
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from transformers import AutoModelForCausalLM, AutoTokenizer, BlenderbotForConditionalGeneration
import torch

chat_tkn = AutoTokenizer.from_pretrained('microsoft/DialoGPT-medium')
mdl = AutoModelForCausalLM.from_pretrained('microsoft/DialoGPT-medium')

# chat_tkn = AutoTokenizer.from_pretrained('facebook/blenderbot-400M-distill')
# mdl = BlenderbotForConditionalGeneration.from_pretrained('facebook/blenderbot-400M-distill')

def converse(user_input, chat_history = []):
    user_input_ids = chat_tkn(user_input + chat_tkn.eos_token, return_tensors = 'pt').input_ids

    # keep history in the tensor
    bot_input_ids = torch.cat([torch.LongTensor(chat_history), user_input_ids], dim = -1)

    # get response
    chat_history = mdl.generate(
        bot_input_ids,
        max_length = 1000,
        pad_token_id = chat_tkn.eos_token_id
    ).tolist()
    print(chat_history)

    response = chat_tkn.decode(chat_history[0]).split("<|endoftext|>")

    print("staring to print response")
    print(response)

    # html for display
    html = "<div class='mybot'>"

    for x, mesg in enumerate(response):
        if x % 2 != 0:
            mesg = "Alicia: " + mesg
            clazz = "alicia"
        else:
            clazz = "user"

        print("value of x")
        print(x)
        print("message")
        print(mesg)

        html += "<div class='mesg {}'> {}</div>".format(clazz, mesg)

    html += "</div>"
    print(html)

    return html, chat_history

import gradio as grad

css = """
.mychat {display:flex;flex-direction:column}
.mesg {padding:5px;margin-bottom:5px;border-radius:5px;width:75%}
.mesg.user {background-color:lightblue;color:white}
.mesg.alicia {background-color:orange;color:white,align-self:self-end}
.footer {display:none !important}
"""

text = grad.inputs.Textbox(placeholder = "Lets chat")
grad.Interface(
    fn = converse,
    theme = "default",
    inputs = [text, "state"],
    outputs = ["html", "state"],
    css = css
).launch()