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Mistral-7B-Instruct-v0.3

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Tested this updated chat template using the following code. Please excuse the length of the below. It includes testing with hardcoded prompts, followed by a chat loop to allow for testing in multi-turn conversations.

from transformers import LlamaTokenizerFast, MistralForCausalLM
import torch
import json
import multiprocessing
import traceback


def restricted_exec(code, return_dict):
    try:
        # Define a restricted set of built-ins
        allowed_builtins = {
            'print': print,
            'range': range,
            'len': len,
            'int': int,
            'float': float,
            'str': str,
            'bool': bool,
            'list': list,
            'dict': dict,
            'set': set,
            'tuple': tuple,
            'abs': abs,
            'sum': sum,
            'min': min,
            'max': max,
            'sorted': sorted,
            'zip': zip,
            'enumerate': enumerate,
            'map': map,
            'filter': filter,
            'all': all,
            'any': any,
        }

        # Create a restricted global and local namespace
        restricted_globals = {
            '__builtins__': allowed_builtins,
        }
        restricted_locals = {}

        execution_code = f'output = {code}'
        # Execute the code in the restricted environment
        exec(execution_code, restricted_globals, restricted_locals)
        return_dict['output'] = restricted_locals.get('output', '')
    except Exception as e:
        return_dict['error'] = traceback.format_exc()


def python_eval_function(python_code_string):
    """
    Executes the given Python code string in a restricted environment using multiprocessing.

    :param python_code_string: The Python code to execute.
    :return: The output of the executed code.
    """
    manager = multiprocessing.Manager()
    return_dict = manager.dict()

    process = multiprocessing.Process(target=restricted_exec, args=(python_code_string, return_dict))
    process.start()
    process.join(timeout=30)  # Set a timeout to prevent long-running code

    if process.is_alive():
        process.terminate()
        raise RuntimeError("Code execution timed out")

    if 'error' in return_dict:
        raise RuntimeError(f"Error executing code: {return_dict['error']}")

    return return_dict.get('output', '')


def dummy_weather_function(location, format):
    print(f"location passed to dummy weather function: {location}")
    print(f"format passed to dummy weather function: {format}")
    return f"Fine, with a chance of showers."


tools_dict = {
    "python_eval_function": python_eval_function,
    'get_current_weather': dummy_weather_function,
}

if __name__ == '__main__':
    device = 'cuda' if torch.cuda.is_available() else 'cpu'

    model_id = 'mistralai/Mistral-7B-Instruct-v0.3'

    tokenizer = LlamaTokenizerFast.from_pretrained(model_id)
    model = MistralForCausalLM.from_pretrained(model_id, torch_dtype=torch.bfloat16,
                                               device_map=device)

    model.generation_config.max_new_tokens = 3000
    model.generation_config.pad_token_id = tokenizer.eos_token_id

    available_tools = [
        {
            "type": "function",
            "function": {
                "name": "get_current_weather",
                "description": "Get the current weather",
                "parameters": {
                    "type": "object",
                    "properties": {
                        "location": {
                            "type": "string",
                            "description": "The city and state, e.g. San Francisco, CA"
                        },
                        "format": {
                            "type": "string",
                            "enum": ["celsius", "fahrenheit"],
                            "description": "The temperature unit to use. Infer this from the users location."
                        }
                    },
                    "required": ["location", "format"]
                }
            }
        },
        {
            "type": "function",
            "function": {
                "name": "python_eval_function",
                "description": "Execute a single line of arbitrary python code. The result of this execution will be returned.",
                "parameters": {
                    "type": "object",
                    "properties": {
                        "python_code_string": {
                            "type": "string",
                            "description": "Single line of python code to execute."
                        }
                    },
                    "required": ["python_code_string"]
                }
            }
        }
    ]

    available_tools_json = json.dumps(available_tools)

    messages_presented = [
        {
            'role': 'user',
            'content': "What's 34529 times 12049581?",
        },
    ]

    messages_raw = [
        {
            'role': 'available_tools',
            'content': available_tools_json,
        },
        *messages_presented
    ]

    prompt_string = tokenizer.apply_chat_template(messages_raw, tokenize=False)

    prompt_tokens = tokenizer.encode(prompt_string)

    prompt_tensor = torch.tensor([prompt_tokens]).to(device)

    result_tokens = model.generate(prompt_tensor)[0]

    new_tokens = result_tokens[len(prompt_tokens):]

    result_string = tokenizer.decode(new_tokens)

    TOOL_CALL_TOKEN = 5
    EOS_TOKEN = 2

    if new_tokens[-1] != 2:
        raise Exception(f"ERROR: Incomplete response")

    if new_tokens[0] == TOOL_CALL_TOKEN:  # if this is a tool call
        tool_call_content_json = new_tokens[1:-1]  # remove the tool call token and the eos token
        tool_json = tokenizer.decode(tool_call_content_json)
        # print(f"INFO: {tool_json=}")
        tool_call_object = json.loads(tool_json)[0]  # TODO: Handle invalid json.
        if tool_call_object.get('name') in tools_dict:
            tool_function = tools_dict[tool_call_object.get('name')]
            tool_call_result = tool_function(
                **tool_call_object.get('arguments'))  # TODO: Handle invalid arguments or nulls, or no arguments key.
            print(f"Tool call result: {tool_call_result}")
            messages_raw += [
                {
                    'role': 'tool_call',
                    'content': tool_json,
                },
                {
                    'role': 'tool_results',
                    'content': str(tool_call_result),
                }
            ]
        else:
            raise Exception(f"TODO: Handling of invalid tools.")
    else:
        raise Exception(f"TODO: Populate with logic to just get new user response.")

    post_tool_prompt_string = tokenizer.apply_chat_template(messages_raw, tokenize=False)

    post_tool_prompt_tokens = tokenizer.encode(post_tool_prompt_string)

    post_tool_prompt_tensor = torch.tensor([post_tool_prompt_tokens]).to(device)

    post_tool_result_tokens = model.generate(post_tool_prompt_tensor)[0]

    post_tool_new_tokens = post_tool_result_tokens[len(post_tool_prompt_tokens):]

    post_tool_result_string = tokenizer.decode(post_tool_new_tokens)

    print(f"Final Output after using tool: '{post_tool_result_string}'")

    print(f"INFO: Tool tested successfully. Proceeding with chat loop for continued testing over longer conversations.")

    messages_presented = []
    skip_user_input = False  # if the previous loop just invoked a tool, skip the user input and allow the model to generate using the result.

    while True:

        if skip_user_input:
            skip_user_input = False  # if skipping this time, reset the flag so the next is not skipped.

            messages_raw = [
                {
                    'role': 'available_tools',
                    'content': available_tools_json,
                },
                *messages_presented
            ]
        else:
            new_user_message = input(f"User: ")
            messages_presented.append(
                {
                    'role': 'user',
                    'content': new_user_message,
                }
            )
            # if taking a new user message, available tools should be before the last user message.
            messages_raw = [
                *messages_presented[:-1],
                {
                    'role': 'available_tools',
                    'content': available_tools_json,
                },
                messages_presented[-1]
            ]

        prompt_string = tokenizer.apply_chat_template(messages_raw, tokenize=False)

        prompt_tokens = tokenizer.encode(prompt_string)

        prompt_tensor = torch.tensor([prompt_tokens]).to(device)

        TOOL_CALL_TOKEN = 5
        EOS_TOKEN = 2
        CLOSE_SQUARE_BRACKET_TOKEN = 29561 # used to determine the end of a tool calls list.

        def determine_if_tool_invoked(prompt_tensor, model):
            previous_max_new_tokens = model.generation_config.max_new_tokens
            model.generation_config.max_new_tokens = 1
            first_token = model.generate(prompt_tensor)[0][len(prompt_tokens)].item() # get the first generated token.
            model.generation_config.max_new_tokens = previous_max_new_tokens # reset generation config.
            return first_token, first_token == TOOL_CALL_TOKEN

        first_token, tool_was_invoked = determine_if_tool_invoked(prompt_tensor, model)
        prompt_tokens.append(TOOL_CALL_TOKEN) # Since we already generated the first token, add this to our prompt so it is not re-computed.
        prompt_tensor = torch.tensor([prompt_tokens]).to(device)

        if tool_was_invoked:
            previous_eos_token = model.generation_config.eos_token_id
            model.generation_config.eos_token_id = CLOSE_SQUARE_BRACKET_TOKEN # If a tool was invoked, stop generation at end of tool invocation list.
            result_tokens = model.generate(prompt_tensor)[0]
            model.generation_config.eos_token_id = previous_eos_token
            #TODO: restrict generation length to something reasonable for tools, and raise/handle exception if reached.
        else:
            # if no tool was invoked, simply generate a response
            result_tokens = model.generate(prompt_tensor)[0]

        new_tokens = result_tokens[len(prompt_tokens):]

        result_string = tokenizer.decode(new_tokens)

        if tool_was_invoked:  # if this is a tool call
            tool_call_content_json = new_tokens  # remove the eos token
            tool_json = tokenizer.decode(tool_call_content_json)
            tool_call_object = json.loads(tool_json)[0]  # TODO: Handle invalid json.
            if tool_call_object.get('name') in tools_dict:
                tool_function = tools_dict[tool_call_object.get('name')]
                tool_call_result = tool_function(
                    **tool_call_object.get(
                        'arguments'))  # TODO: Handle invalid arguments or nulls, or no arguments key.
                print(f"Tool call result: {tool_call_result}")
                messages_presented += [
                    {
                        'role': 'tool_call',
                        'content': tool_json,
                    },
                    {
                        'role': 'tool_results',
                        'content': str(tool_call_result),
                    },
                ]
                skip_user_input = True  # Skip the next user input if tool invoked to allow assistant to create a response using tool output.
            else:
                raise Exception(f"TODO: Handling of invalid tools.")
        else:
            assistant_response_cleaned = tokenizer.decode(
                new_tokens[:-1])  # exclude eos token. This will be added back by chat template on next loop.
            messages_presented.append({
                'role': 'assistant',
                'content': assistant_response_cleaned,
            })
            print(f"Assistant: {assistant_response_cleaned}")

Note that I have tested the template using the chat loop with multi-turn conversations, using both tools multiple times, with successful use of these tools by the model. The output of this multi-turn chat was:

Connected to pydev debugger (build 233.14475.56)
Loading checkpoint shards: 100%|██████████| 3/3 [00:05<00:00,  1.92s/it]
Tool call result: 416059982349
Final Output after using tool: 'The result of 34529 times 12049581 is 416059982349.</s>'
INFO: Tool tested successfully. Proceeding with chat loop for continued testing over longer conversations.
User: >? Hey, what's the weather like in auckland right now? 
location passed to dummy weather function: Auckland, NZ
format passed to dummy weather function: celsius
Tool call result: Fine, with a chance of showers.
Assistant: It seems that it's currently fine with a chance of showers in Auckland, New Zealand. Enjoy your day! If you need any other information, feel free to ask.
User: >? Thanks! And what's 58273957 times 293847?
Tool call result: 17123627442579
Assistant: The result of 58273957 times 293847 is 17123627442579.
User: >? Thanks! what about 91827464 / 2817236 ?
Tool call result: 32.59487810037924
Assistant: The result of 91827464 divided by 2817236 is approximately 32.59487810037924.
User: >? fun stuff. How about the weather in melbourne?
location passed to dummy weather function: Melbourne, AU
format passed to dummy weather function: celsius
Tool call result: Fine, with a chance of showers.
Assistant: It seems that it's currently fine with a chance of showers in Melbourne, Australia. Have a great day! If you need any other information, feel free to ask.

@lcahill
How did you manage to load tokenizer?
LlamaTokenizerFast.from_pretrained("mistralai/Mistral-7B-Instruct-v0.3") gives an exception:
Exception: data did not match any variant of untagged enum PyPreTokenizerTypeWrapper at line 6952 column 3

@lcahill
Hey I am trying to figure out the prompt structure of the model and I haven't found any information. It seems like you have a good grip on this. If you can provide some resources on that it would be much appreciated.

Here are some additional questions:
How do you know that LlamaTokenizerFast is compatible with mistralai/Mistral-7B-Instruct-v0.3?
How do you know that the below message type is supported:

                {
                    'role': 'available_tools',
                    'content': available_tools_json,
                },

@lcahill
How did you manage to load tokenizer?
LlamaTokenizerFast.from_pretrained("mistralai/Mistral-7B-Instruct-v0.3") gives an exception:
Exception: data did not match any variant of untagged enum PyPreTokenizerTypeWrapper at line 6952 column 3

Hi @Alordan ,

Strange, I am not getting the same exception. Running on Windows 11 with transformers version 4.41.1. Maybe you need to update your transformers version?

@lcahill
Hey I am trying to figure out the prompt structure of the model and I haven't found any information. It seems like you have a good grip on this. If you can provide some resources on that it would be much appreciated.

Hi @SebastianS , I was able to figure out the chat template by using mistral's mistral_inference and mistral_common python libraries. They have some instructions in the readme of this model.

How do you know that LlamaTokenizerFast is compatible with mistralai/Mistral-7B-Instruct-v0.3?

I got this by loading the tokenizer, then checking its type. The AutoTokenizer will figure out the correct tokenizer based on the config.

import transformers
from transformers import AutoTokenizer, LlamaTokenizerFast

print(f"{transformers.__version__=}")

model_id = 'mistralai/Mistral-7B-Instruct-v0.3'

# Load both tokenizers and ensure they are the same type

tokenizer_from_pretrained = AutoTokenizer.from_pretrained(model_id)

print(f"{type(tokenizer_from_pretrained)=}")

tokenizer_from_llama_tokenizer_fast = LlamaTokenizerFast.from_pretrained(model_id)

print(f"{type(tokenizer_from_llama_tokenizer_fast)=}")

assert type(tokenizer_from_pretrained) == type(tokenizer_from_llama_tokenizer_fast)

This outputs:

transformers.__version__='4.41.1'
type(tokenizer_from_pretrained)=<class 'transformers.models.llama.tokenization_llama_fast.LlamaTokenizerFast'>
type(tokenizer_from_llama_tokenizer_fast)=<class 'transformers.models.llama.tokenization_llama_fast.LlamaTokenizerFast'>

How do you know that the below message type is supported:

                {
                    'role': 'available_tools',
                    'content': available_tools_json,
                },

This is only compatible after changing the chat template, as I am attempting to do via this PR. Note you can also change this at runtime by running something like the below.

# apply custom chat template to model as an example.
from transformers import LlamaTokenizerFast, AutoModelForCausalLM
import json
import torch

new_chat_template = """{{ bos_token }}{% for message in messages %}{% if loop.index0 == 0 and message['role'] not in ['available_tools', 'user'] %}{{ raise_exception('The first message must be either available_tools or user role!') }}{% endif %}{% if message['role'] not in ['user', 'assistant', 'available_tools', 'tool_call', 'tool_results'] %}{{ raise_exception('Only user, assistant, available_tools, tool_call, and tool_results roles are supported!') }}{% endif %}{% if message['role'] == 'user' %}{{ '[INST] ' + message['content'] + '[/INST]' }}{% elif message['role'] == 'assistant' %}{{ message['content'] + eos_token }}{% elif message['role'] == 'available_tools' %}{{ '[AVAILABLE_TOOLS] ' + message['content'] + '[/AVAILABLE_TOOLS]' }}{% elif message['role'] == 'tool_call' %}{{ '[TOOL_CALLS]' + message['content'] + eos_token }}{% elif message['role'] == 'tool_results' %}{{ '[TOOL_RESULTS]' + message['content'] + '[/TOOL_RESULTS]' }}{% endif %}{% endfor %}"""

available_tools = [
    {
        "type": "function",
        "function": {
            "name": "get_current_weather",
            "description": "Get the current weather",
            "parameters": {
                "type": "object",
                "properties": {
                    "location": {
                        "type": "string",
                        "description": "The city and state, e.g. San Francisco, CA"
                    },
                    "format": {
                        "type": "string",
                        "enum": ["celsius", "fahrenheit"],
                        "description": "The temperature unit to use. Infer this from the users location."
                    }
                },
                "required": ["location", "format"]
            }
        }
    },
    {
        "type": "function",
        "function": {
            "name": "python_eval_function",
            "description": "Execute a single line of arbitrary python code. The result of this execution will be returned.",
            "parameters": {
                "type": "object",
                "properties": {
                    "python_code_string": {
                        "type": "string",
                        "description": "Single line of python code to execute."
                    }
                },
                "required": ["python_code_string"]
            }
        }
    }
]

available_tools_json = json.dumps(available_tools)


messages = [
    {
        'role': 'user',
        'content': "Hey! What's the weather like in auckland?"
    },
    {
        'role': 'tool_call',
        'content': '[{"name": "get_current_weather", "arguments": {"location": "Auckland, NZ", "format": "celsius"}}]'
    },
    {
        'role': 'tool_results',
        'content': 'Fine, with a chance of showers.'
    },
    {
        'role': 'assistant',
        'content': "It looks like it's going to be a bit rainy in Auckland today. Be sure to take an umbrella with you!"
    },
    {
        'role': 'user',
        'content': 'Thanks! And whats 9817249382934 times 116263212356?'
    },
    {
        'role': 'tool_call',
        'content': '[{"name": "python_eval_function", "arguments": {"python_code_string": "9817249382934 * 116263212356"}}]'
    },
    {
        'role': 'tool_results',
        'content': '1141384949759865604332504'
    },
    {
        'role': 'assistant',
        'content': "That's a very large number! It's 1,141,384,949,975,986,560,433,250,040 when written in standard format."
    },
    {
        'role': 'available_tools',
        'content': available_tools_json,
    },
    {
        'role': 'user',
        'content': 'interesting that you failed to correctly provide the tool result. I guess there are some limitations to small LLMs! What is the actual result?'
    },
]

model_id = 'mistralai/Mistral-7B-Instruct-v0.3'

device = 'cuda' if torch.cuda.is_available() else 'cpu'

tokenizer = LlamaTokenizerFast.from_pretrained(model_id)
model = AutoModelForCausalLM.from_pretrained(model_id, device_map=device, torch_dtype=torch.bfloat16)

model.generation_config.max_new_tokens = 3000
model.generation_config.pad_token_id = tokenizer.eos_token_id

input_string = tokenizer .apply_chat_template(
    messages,
    chat_template=new_chat_template,
    tokenize=False,
)
print(f"{input_string=}")

input_tokens = tokenizer.encode(input_string, return_tensors='pt').to(device)

result_tokens = model.generate(input_tokens)[0]

new_tokens = result_tokens[len(input_tokens[0]):]

result_string = tokenizer.decode(new_tokens)

print(f"{result_string=}")

This outputs:

Loading checkpoint shards: 100%|██████████| 3/3 [00:05<00:00,  1.92s/it]
input_string='<s>[INST] Hey! What\'s the weather like in auckland?[/INST][TOOL_CALLS][{"name": "get_current_weather", "arguments": {"location": "Auckland, NZ", "format": "celsius"}}]</s>[TOOL_RESULTS]Fine, with a chance of showers.[/TOOL_RESULTS]It looks like it\'s going to be a bit rainy in Auckland today. Be sure to take an umbrella with you!</s>[INST] Thanks! And whats 9817249382934 times 116263212356?[/INST][TOOL_CALLS][{"name": "python_eval_function", "arguments": {"python_code_string": "9817249382934 * 116263212356"}}]</s>[TOOL_RESULTS]1141384949759865604332504[/TOOL_RESULTS]That\'s a very large number! It\'s 1,141,384,949,975,986,560,433,250,040 when written in standard format.</s>[AVAILABLE_TOOLS] [{"type": "function", "function": {"name": "get_current_weather", "description": "Get the current weather", "parameters": {"type": "object", "properties": {"location": {"type": "string", "description": "The city and state, e.g. San Francisco, CA"}, "format": {"type": "string", "enum": ["celsius", "fahrenheit"], "description": "The temperature unit to use. Infer this from the users location."}}, "required": ["location", "format"]}}}, {"type": "function", "function": {"name": "python_eval_function", "description": "Execute a single line of arbitrary python code. The result of this execution will be returned.", "parameters": {"type": "object", "properties": {"python_code_string": {"type": "string", "description": "Single line of python code to execute."}}, "required": ["python_code_string"]}}}][/AVAILABLE_TOOLS][INST] interesting that you failed to correctly provide the tool result. I guess there are some limitations to small LLMs! What is the actual result?[/INST]'
result_string='Apologies for the confusion. The result of the multiplication operation is 1,141,384,949,975,986,560,433,250,040.</s>'

Process finished with exit code 0

Note the model is still getting this wrong. It could be inherent limitations of a 7b model, or it could be due to my ordering of the messages. I am putting the available tools before the last user message because this comment mentioned that is how the mistral libraries do it.

https://huggingface.co/mistralai/Mistral-7B-Instruct-v0.3/discussions/17#66519aade6ddaa4f89902342

Regardless of how the messages need to be ordered, I think adding tools to the chat template makes them easier to implement.

There's a chance I may have issues with my implementation of the chat_template so I am keen for people to try it out and provide feedback. I have noticed the model can be quite sensitive to layout of tokens so even things like missing/additional spaces in the chat template can impact model output quality.

Hi, Matt from Hugging Face here. We've actually added a new tool use API that will come out in the next version of Transformers. You can see the API docs here. We've also made a PR to Mistral to enable the new API, and you can see it here