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import asyncio
import json
import sys
try:
import websockets
except ImportError:
print("Websockets package not found. Make sure it's installed.")
# For local streaming, the websockets are hosted without ssl - ws://
HOST = 'localhost:5005'
URI = f'ws://{HOST}/api/v1/chat-stream'
# For reverse-proxied streaming, the remote will likely host with ssl - wss://
# URI = 'wss://your-uri-here.trycloudflare.com/api/v1/stream'
async def run(user_input, history):
# Note: the selected defaults change from time to time.
request = {
'user_input': user_input,
'max_new_tokens': 250,
'history': history,
'mode': 'instruct', # Valid options: 'chat', 'chat-instruct', 'instruct'
'character': 'Example',
'instruction_template': 'Vicuna-v1.1', # Will get autodetected if unset
# 'context_instruct': '', # Optional
'your_name': 'You',
'regenerate': False,
'_continue': False,
'stop_at_newline': False,
'chat_generation_attempts': 1,
'chat-instruct_command': 'Continue the chat dialogue below. Write a single reply for the character "<|character|>".\n\n<|prompt|>',
# Generation params. If 'preset' is set to different than 'None', the values
# in presets/preset-name.yaml are used instead of the individual numbers.
'preset': 'None',
'do_sample': True,
'temperature': 0.7,
'top_p': 0.1,
'typical_p': 1,
'epsilon_cutoff': 0, # In units of 1e-4
'eta_cutoff': 0, # In units of 1e-4
'tfs': 1,
'top_a': 0,
'repetition_penalty': 1.18,
'repetition_penalty_range': 0,
'top_k': 40,
'min_length': 0,
'no_repeat_ngram_size': 0,
'num_beams': 1,
'penalty_alpha': 0,
'length_penalty': 1,
'early_stopping': False,
'mirostat_mode': 0,
'mirostat_tau': 5,
'mirostat_eta': 0.1,
'seed': -1,
'add_bos_token': True,
'truncation_length': 2048,
'ban_eos_token': False,
'skip_special_tokens': True,
'stopping_strings': []
}
async with websockets.connect(URI, ping_interval=None) as websocket:
await websocket.send(json.dumps(request))
while True:
incoming_data = await websocket.recv()
incoming_data = json.loads(incoming_data)
match incoming_data['event']:
case 'text_stream':
yield incoming_data['history']
case 'stream_end':
return
async def print_response_stream(user_input, history):
cur_len = 0
async for new_history in run(user_input, history):
cur_message = new_history['visible'][-1][1][cur_len:]
cur_len += len(cur_message)
print(cur_message, end='')
sys.stdout.flush() # If we don't flush, we won't see tokens in realtime.
if __name__ == '__main__':
user_input = "Please give me a step-by-step guide on how to plant a tree in my backyard."
# Basic example
history = {'internal': [], 'visible': []}
# "Continue" example. Make sure to set '_continue' to True above
# arr = [user_input, 'Surely, here is']
# history = {'internal': [arr], 'visible': [arr]}
asyncio.run(print_response_stream(user_input, history))
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