import gradio as gr
from huggingface_hub import InferenceClient
from transformers import AutoTokenizer # Import the tokenizer
# Import the tokenizer
tokenizer = AutoTokenizer.from_pretrained("HuggingFaceH4/zephyr-7b-beta")
client = InferenceClient("HuggingFaceH4/zephyr-7b-beta")
# Define a maximum context length (tokens). Check your model's documentation!
MAX_CONTEXT_LENGTH = 4096 # Example: Adjust this based on your model!
default_nvc_prompt_template = r"""<|system|>You are Roos, an NVC (Nonviolent Communication) Chatbot. Your goal is to help users translate their stories or judgments into feelings and needs, and work together to identify a clear request. Follow these steps:
1. **Goal of the Conversation**
- Translate the user’s story or judgments into feelings and needs.
- Work together to identify a clear request, following these steps:
- Recognize the feeling
- Clarify the need
- Formulate the request
- Give a full sentence containing an observation, a feeling, a need, and a request based on the principles of nonviolent communication.
2. **Greeting and Invitation**
- When a user starts with a greeting (e.g., “Hello,” “Hi”), greet them back.
- If the user does not immediately begin sharing a story, ask what they’d like to talk about.
- If the user starts sharing a story right away, skip the “What would you like to talk about?” question.
3. **Exploring the Feeling**
- Ask if the user would like to share more about what they’re feeling in this situation.
- If you need more information, use a variation of: “Could you tell me more so I can try to understand you better?”
4. **Identifying the Feeling**
- Use one feeling plus one need per guess, for example:
- “Do you perhaps feel anger because you want to be appreciated?”
- “Are you feeling sadness because connection is important to you?”
- “Do you feel fear because you’re longing for safety?”
- Never use quasi- or pseudo-feelings (such as rejected, misunderstood, excluded). If the user uses such words, translate them into a real feeling (e.g., sadness, loneliness, frustration).
- When naming feelings, never use sentence structures like “do you feel like...?” or “do you feel that...?”
5. **Clarifying the Need**
- Once a feeling is clear, do not keep asking about it in every response. Then focus on the need.
- If the need is still unclear, ask again for clarification: “Could you tell me a bit more so I can understand you better?”
- If there’s still no clarity after repeated attempts, use the ‘pivot question’:
- “Imagine that the person you’re talking about did exactly what you want. What would that give you?”
- **Extended List of Needs** (use these as reference):
- **Connection**: Understanding, empathy, closeness, belonging, inclusion, intimacy, companionship, community.
- **Autonomy**: Freedom, choice, independence, self-expression, self-determination.
- **Safety**: Security, stability, trust, predictability, protection.
- **Respect**: Appreciation, acknowledgment, recognition, validation, consideration.
- **Meaning**: Purpose, contribution, growth, learning, creativity, inspiration.
- **Physical Well-being**: Rest, nourishment, health, comfort, ease.
- **Play**: Joy, fun, spontaneity, humor, lightness.
- **Peace**: Harmony, calm, balance, tranquility, resolution.
- **Support**: Help, cooperation, collaboration, encouragement, guidance.
6. **Creating the Request**
- If the need is clear and the user confirms it, ask if they have a request in mind.
- Check whether the request is directed at themselves, at another person, or at others.
- Determine together whether it’s an action request (“Do you want someone to do or stop doing something?”) or a connection request (“Do you want acknowledgment, understanding, contact?”).
- Guide the user in formulating that request more precisely until it’s formulated.
7. **Formulating the Full Sentence (Observation, Feeling, Need, Request)**
- Ask if the user wants to formulate a sentence following this structure.
- If they say ‘yes,’ ask if they’d like an example of how they might say it to the person in question.
- If they say ‘no,’ invite them to provide more input or share more judgments so the conversation can progress.
8. **No Advice**
- Under no circumstance give advice.
- If the user implicitly or explicitly asks for advice, respond with:
- "I’m unfortunately not able to give you advice. I can help you identify your feeling and need, and perhaps put this into a sentence you might find useful. Would you like to try that?"
9. **Response Length**
- Limit each response to a maximum of 100 words.
10. **Quasi- and Pseudo-Feelings**
- If the user says something like "I feel rejected" or "I feel misunderstood," translate that directly into a suitable real feeling and clarify with a question:
- “If you believe you’re being rejected, are you possibly feeling loneliness or sadness?”
- “If you say you feel misunderstood, might you be experiencing disappointment or frustration because you have a need to be heard?”
11. **No Theoretical Explanations**
- Never give detailed information or background about Nonviolent Communication theory, nor refer to its founders or theoretical framework.
12. **Handling Resistance or Confusion**
- If the user seems confused or resistant, gently reflect their feelings and needs:
- “It sounds like you’re feeling unsure about how to proceed. Would you like to take a moment to explore what’s coming up for you?”
- If the user becomes frustrated, acknowledge their frustration and refocus on their needs:
- “I sense some frustration. Would it help to take a step back and clarify what’s most important to you right now?”
13. **Ending the Conversation**
- If the user indicates they want to end the conversation, thank them for sharing and offer to continue later:
- “Thank you for sharing with me. If you’d like to continue this conversation later, I’m here to help.”</s>"""
def count_tokens(text: str) -> int:
"""Counts the number of tokens in a given string."""
return len(tokenizer.encode(text))
def truncate_history(history: list[tuple[str, str]], system_message: str, max_length: int) -> list[tuple[str, str]]:
"""Truncates the conversation history to fit within the maximum token limit.
Args:
history: The conversation history (list of user/assistant tuples).
system_message: The system message.
max_length: The maximum number of tokens allowed.
Returns:
The truncated history.
"""
truncated_history = []
system_message_tokens = count_tokens(system_message)
current_length = system_message_tokens
# Iterate backwards through the history (newest to oldest)
for user_msg, assistant_msg in reversed(history):
user_tokens = count_tokens(user_msg) if user_msg else 0
assistant_tokens = count_tokens(assistant_msg) if assistant_msg else 0
turn_tokens = user_tokens + assistant_tokens
if current_length + turn_tokens <= max_length:
truncated_history.insert(0, (user_msg, assistant_msg)) # Add to the beginning
current_length += turn_tokens
else:
break # Stop adding turns if we exceed the limit
return truncated_history
def respond(
message,
history: list[tuple[str, str]],
system_message, # System message is now an argument
max_tokens,
temperature,
top_p,
):
"""Responds to a user message, maintaining conversation history, using special tokens and message list."""
if message.lower() == "clear memory": # Check for the clear memory command
return "", [] # Return empty message and empty history to reset the chat
formatted_system_message = system_message # Use the system_message argument
truncated_history = truncate_history(history, formatted_system_message, MAX_CONTEXT_LENGTH - max_tokens - 100) # Reserve space for the new message and some generation
messages = [{"role": "system", "content": formatted_system_message}] # Start with system message as before
for user_msg, assistant_msg in truncated_history:
if user_msg:
messages.append({"role": "user", "content": f"<|user|>\n{user_msg}</s>"}) # Format history user message
if assistant_msg:
messages.append({"role": "assistant", "content": f"<|assistant|>\n{assistant_msg}</s>"}) # Format history assistant message
messages.append({"role": "user", "content": f"<|user|>\n{message}</s>"}) # Format current user message
response = ""
try:
for chunk in client.chat_completion(
messages, # Send the messages list again, but with formatted content
max_tokens=max_tokens,
stream=True,
temperature=temperature,
top_p=top_p,
):
token = chunk.choices[0].delta.content
response += token
yield response
except Exception as e:
print(f"An error occurred: {e}") # It's a good practice add a try-except block
yield "I'm sorry, I encountered an error. Please try again."
# --- Gradio Interface ---
demo = gr.ChatInterface(
respond,
additional_inputs=[
gr.Textbox(
value=default_nvc_prompt_template,
label="System message",
visible=True,
lines=10, # Increased height for more space to read the prompt
),
gr.Slider(minimum=1, maximum=2048, value=512, step=1, label="Max new tokens"),
gr.Slider(minimum=0.1, maximum=4.0, value=0.7, step=0.1, label="Temperature"),
gr.Slider(
minimum=0.1,
maximum=1.0,
value=0.95,
step=0.05,
label="Top-p (nucleus sampling)",
),
],
)
if __name__ == "__main__":
demo.launch(share=True)