text-generation-webui/server.py

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Python
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import re
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import time
import glob
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from sys import exit
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import torch
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import argparse
import json
from pathlib import Path
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import gradio as gr
import transformers
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from html_generator import *
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from transformers import AutoTokenizer, AutoModelForCausalLM
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import warnings
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transformers.logging.set_verbosity_error()
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parser = argparse.ArgumentParser()
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parser.add_argument('--model', type=str, help='Name of the model to load by default.')
parser.add_argument('--notebook', action='store_true', help='Launch the webui in notebook mode, where the output is written to the same text box as the input.')
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parser.add_argument('--chat', action='store_true', help='Launch the webui in chat mode.')
parser.add_argument('--cai-chat', action='store_true', help='Launch the webui in chat mode with a style similar to Character.AI\'s. If the file profile.png exists in the same folder as server.py, this image will be used as the bot\'s profile picture.')
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parser.add_argument('--cpu', action='store_true', help='Use the CPU to generate text.')
parser.add_argument('--auto-devices', action='store_true', help='Automatically split the model across the available GPU(s) and CPU.')
parser.add_argument('--load-in-8bit', action='store_true', help='Load the model with 8-bit precision.')
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parser.add_argument('--no-listen', action='store_true', help='Make the webui unreachable from your local network.')
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parser.add_argument('--settings-file', type=str, help='Load default interface settings from this json file. See settings-template.json for an example.')
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args = parser.parse_args()
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loaded_preset = None
available_models = sorted(set(map(lambda x : str(x.name).replace('.pt', ''), list(Path('models/').glob('*'))+list(Path('torch-dumps/').glob('*')))))
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available_models = [item for item in available_models if not item.endswith('.txt')]
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available_models = sorted(available_models, key=str.lower)
available_presets = sorted(set(map(lambda x : str(x.name).split('.')[0], list(Path('presets').glob('*.txt')))))
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settings = {
'max_new_tokens': 200,
'max_new_tokens_min': 1,
'max_new_tokens_max': 2000,
'preset': 'NovelAI-Sphinx Moth',
'name1': 'Person 1',
'name2': 'Person 2',
'name1_pygmalion': 'You',
'name2_pygmalion': 'Kawaii',
'context': 'This is a conversation between two people.',
'context_pygmalion': 'This is a conversation between two people.\n<START>',
'prompt': 'Common sense questions and answers\n\nQuestion: \nFactual answer:',
'prompt_gpt4chan': '-----\n--- 865467536\nInput text\n--- 865467537\n',
'stop_at_newline': True,
}
if args.settings_file is not None and Path(args.settings_file).exists():
with open(Path(args.settings_file), 'r') as f:
new_settings = json.load(f)
for i in new_settings:
if i in settings:
settings[i] = new_settings[i]
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def load_model(model_name):
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print(f"Loading {model_name}...")
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t0 = time.time()
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# Default settings
if not (args.cpu or args.auto_devices or args.load_in_8bit):
if Path(f"torch-dumps/{model_name}.pt").exists():
print("Loading in .pt format...")
model = torch.load(Path(f"torch-dumps/{model_name}.pt"))
elif model_name.lower().startswith(('gpt-neo', 'opt-', 'galactica')) and any(size in model_name.lower() for size in ('13b', '20b', '30b')):
model = AutoModelForCausalLM.from_pretrained(Path(f"models/{model_name}"), device_map='auto', load_in_8bit=True)
else:
model = AutoModelForCausalLM.from_pretrained(Path(f"models/{model_name}"), low_cpu_mem_usage=True, torch_dtype=torch.float16).cuda()
# Custom
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else:
settings = ["low_cpu_mem_usage=True"]
cuda = ""
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command = "AutoModelForCausalLM.from_pretrained"
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if args.cpu:
settings.append("torch_dtype=torch.float32")
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else:
if args.load_in_8bit:
settings.append("device_map='auto'")
settings.append("load_in_8bit=True")
else:
settings.append("torch_dtype=torch.float16")
if args.auto_devices:
settings.append("device_map='auto'")
else:
cuda = ".cuda()"
settings = ', '.join(settings)
command = f"{command}(Path(f'models/{model_name}'), {settings}){cuda}"
model = eval(command)
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# Loading the tokenizer
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if model_name.lower().startswith(('gpt4chan', 'gpt-4chan', '4chan')) and Path(f"models/gpt-j-6B/").exists():
tokenizer = AutoTokenizer.from_pretrained(Path("models/gpt-j-6B/"))
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else:
tokenizer = AutoTokenizer.from_pretrained(Path(f"models/{model_name}/"))
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print(f"Loaded the model in {(time.time()-t0):.2f} seconds.")
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return model, tokenizer
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# Removes empty replies from gpt4chan outputs
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def fix_gpt4chan(s):
for i in range(10):
s = re.sub("--- [0-9]*\n>>[0-9]*\n---", "---", s)
s = re.sub("--- [0-9]*\n *\n---", "---", s)
s = re.sub("--- [0-9]*\n\n\n---", "---", s)
return s
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# Fix the LaTeX equations in GALACTICA
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def fix_galactica(s):
s = s.replace(r'\[', r'$')
s = s.replace(r'\]', r'$')
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s = s.replace(r'\(', r'$')
s = s.replace(r'\)', r'$')
s = s.replace(r'$$', r'$')
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return s
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def generate_html(s):
s = '\n'.join([f'<p style="margin-bottom: 20px">{line}</p>' for line in s.split('\n')])
s = f'<div style="max-width: 600px; margin-left: auto; margin-right: auto; background-color:#eef2ff; color:#0b0f19; padding:3em; font-size:1.2em;">{s}</div>'
return s
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def generate_reply(question, tokens, inference_settings, selected_model, eos_token=None):
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global model, tokenizer, model_name, loaded_preset, preset
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if selected_model != model_name:
model_name = selected_model
model = None
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tokenizer = None
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if not args.cpu:
torch.cuda.empty_cache()
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model, tokenizer = load_model(model_name)
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if inference_settings != loaded_preset:
with open(Path(f'presets/{inference_settings}.txt'), 'r') as infile:
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preset = infile.read()
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loaded_preset = inference_settings
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if not args.cpu:
torch.cuda.empty_cache()
input_ids = tokenizer.encode(str(question), return_tensors='pt').cuda()
cuda = ".cuda()"
else:
input_ids = tokenizer.encode(str(question), return_tensors='pt')
cuda = ""
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if eos_token is None:
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output = eval(f"model.generate(input_ids, {preset}){cuda}")
else:
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n = tokenizer.encode(eos_token, return_tensors='pt')[0][-1]
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output = eval(f"model.generate(input_ids, eos_token_id={n}, {preset}){cuda}")
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reply = tokenizer.decode(output[0], skip_special_tokens=True)
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reply = reply.replace(r'<|endoftext|>', '')
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if model_name.lower().startswith('galactica'):
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reply = fix_galactica(reply)
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return reply, reply, generate_html(reply)
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elif model_name.lower().startswith('gpt4chan'):
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reply = fix_gpt4chan(reply)
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return reply, 'Only applicable for galactica models.', generate_4chan_html(reply)
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else:
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return reply, 'Only applicable for galactica models.', generate_html(reply)
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# Choosing the default model
if args.model is not None:
model_name = args.model
else:
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if len(available_models) == 0:
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print("No models are available! Please download at least one.")
exit(0)
elif len(available_models) == 1:
i = 0
else:
print("The following models are available:\n")
for i,model in enumerate(available_models):
print(f"{i+1}. {model}")
print(f"\nWhich one do you want to load? 1-{len(available_models)}\n")
i = int(input())-1
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print()
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model_name = available_models[i]
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model, tokenizer = load_model(model_name)
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# UI settings
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if model_name.lower().startswith('gpt4chan'):
default_text = settings['prompt_gpt4chan']
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else:
default_text = settings['prompt']
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description = f"\n\n# Text generation lab\nGenerate text using Large Language Models.\n"
css=".my-4 {margin-top: 0} .py-6 {padding-top: 2.5rem}"
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if args.notebook:
with gr.Blocks(css=css, analytics_enabled=False) as interface:
gr.Markdown(description)
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with gr.Tab('Raw'):
textbox = gr.Textbox(value=default_text, lines=23)
with gr.Tab('Markdown'):
markdown = gr.Markdown()
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with gr.Tab('HTML'):
html = gr.HTML()
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btn = gr.Button("Generate")
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length_slider = gr.Slider(minimum=settings['max_new_tokens_min'], maximum=settings['max_new_tokens_max'], step=1, label='max_new_tokens', value=settings['max_new_tokens'])
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with gr.Row():
with gr.Column():
model_menu = gr.Dropdown(choices=available_models, value=model_name, label='Model')
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with gr.Column():
preset_menu = gr.Dropdown(choices=available_presets, value=settings['preset'], label='Settings preset')
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btn.click(generate_reply, [textbox, length_slider, preset_menu, model_menu], [textbox, markdown, html], show_progress=True, api_name="textgen")
textbox.submit(generate_reply, [textbox, length_slider, preset_menu, model_menu], [textbox, markdown, html], show_progress=True)
elif args.chat or args.cai_chat:
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history = []
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# This gets the new line characters right.
def chat_response_cleaner(text):
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text = text.replace('\n', '\n\n')
text = re.sub(r"\n{3,}", "\n\n", text)
text = text.strip()
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return text
def chatbot_wrapper(text, tokens, inference_settings, selected_model, name1, name2, context, check):
text = chat_response_cleaner(text)
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question = context+'\n\n'
for i in range(len(history)):
question += f"{name1}: {history[i][0][3:-5].strip()}\n"
question += f"{name2}: {history[i][1][3:-5].strip()}\n"
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question += f"{name1}: {text}\n"
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question += f"{name2}:"
if check:
reply = generate_reply(question, tokens, inference_settings, selected_model, eos_token='\n')[0]
reply = reply[len(question):].split('\n')[0].strip()
else:
reply = generate_reply(question, tokens, inference_settings, selected_model)[0]
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reply = reply[len(question):]
idx = reply.find(f"\n{name1}:")
if idx != -1:
reply = reply[:idx]
reply = chat_response_cleaner(reply)
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history.append((text, reply))
return history
def cai_chatbot_wrapper(text, tokens, inference_settings, selected_model, name1, name2, context, check):
history = chatbot_wrapper(text, tokens, inference_settings, selected_model, name1, name2, context, check)
return generate_chat_html(history, name1, name2)
def remove_last_message(name1, name2):
history.pop()
if args.cai_chat:
return generate_chat_html(history, name1, name2)
else:
return history
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def clear():
global history
history = []
def clear_html():
return generate_chat_html([], "", "")
if 'pygmalion' in model_name.lower():
context_str = settings['context_pygmalion']
name1_str = settings['name1_pygmalion']
name2_str = settings['name2_pygmalion']
else:
context_str = settings['context']
name1_str = settings['name1']
name2_str = settings['name2']
with gr.Blocks(css=css+".h-\[40vh\] {height: 50vh}", analytics_enabled=False) as interface:
gr.Markdown(description)
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with gr.Row():
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with gr.Column():
length_slider = gr.Slider(minimum=settings['max_new_tokens_min'], maximum=settings['max_new_tokens_max'], step=1, label='max_new_tokens', value=settings['max_new_tokens'])
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with gr.Row():
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with gr.Column():
model_menu = gr.Dropdown(choices=available_models, value=model_name, label='Model')
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with gr.Column():
preset_menu = gr.Dropdown(choices=available_presets, value=settings['preset'], label='Settings preset')
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name1 = gr.Textbox(value=name1_str, lines=1, label='Your name')
name2 = gr.Textbox(value=name2_str, lines=1, label='Bot\'s name')
context = gr.Textbox(value=context_str, lines=2, label='Context')
with gr.Row():
check = gr.Checkbox(value=settings['stop_at_newline'], label='Stop generating at new line character?')
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with gr.Column():
if args.cai_chat:
display1 = gr.HTML(value=generate_chat_html([], "", ""))
else:
display1 = gr.Chatbot()
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textbox = gr.Textbox(lines=2, label='Input')
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btn = gr.Button("Generate")
with gr.Row():
with gr.Column():
btn3 = gr.Button("Remove last message")
with gr.Column():
btn2 = gr.Button("Clear history")
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if args.cai_chat:
btn.click(cai_chatbot_wrapper, [textbox, length_slider, preset_menu, model_menu, name1, name2, context, check], display1, show_progress=True, api_name="textgen")
textbox.submit(cai_chatbot_wrapper, [textbox, length_slider, preset_menu, model_menu, name1, name2, context, check], display1, show_progress=True)
btn2.click(clear_html, [], display1, show_progress=False)
else:
btn.click(chatbot_wrapper, [textbox, length_slider, preset_menu, model_menu, name1, name2, context, check], display1, show_progress=True, api_name="textgen")
textbox.submit(chatbot_wrapper, [textbox, length_slider, preset_menu, model_menu, name1, name2, context, check], display1, show_progress=True)
btn2.click(lambda x: "", display1, display1)
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btn2.click(clear)
btn3.click(remove_last_message, [name1, name2], display1, show_progress=False)
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btn.click(lambda x: "", textbox, textbox, show_progress=False)
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textbox.submit(lambda x: "", textbox, textbox, show_progress=False)
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else:
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def continue_wrapper(question, tokens, inference_settings, selected_model):
a, b, c = generate_reply(question, tokens, inference_settings, selected_model)
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return a, a, b, c
with gr.Blocks(css=css, analytics_enabled=False) as interface:
gr.Markdown(description)
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with gr.Row():
with gr.Column():
textbox = gr.Textbox(value=default_text, lines=15, label='Input')
length_slider = gr.Slider(minimum=settings['max_new_tokens_min'], maximum=settings['max_new_tokens_max'], step=1, label='max_new_tokens', value=settings['max_new_tokens'])
preset_menu = gr.Dropdown(choices=available_presets, value=settings['preset'], label='Settings preset')
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model_menu = gr.Dropdown(choices=available_models, value=model_name, label='Model')
btn = gr.Button("Generate")
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cont = gr.Button("Continue")
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with gr.Column():
with gr.Tab('Raw'):
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output_textbox = gr.Textbox(lines=15, label='Output')
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with gr.Tab('Markdown'):
markdown = gr.Markdown()
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with gr.Tab('HTML'):
html = gr.HTML()
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btn.click(generate_reply, [textbox, length_slider, preset_menu, model_menu], [output_textbox, markdown, html], show_progress=True, api_name="textgen")
cont.click(continue_wrapper, [output_textbox, length_slider, preset_menu, model_menu], [output_textbox, textbox, markdown, html], show_progress=True)
textbox.submit(generate_reply, [textbox, length_slider, preset_menu, model_menu], [output_textbox, markdown, html], show_progress=True)
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if args.no_listen:
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interface.launch(share=False)
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else:
interface.launch(share=False, server_name="0.0.0.0")