Error in generating tool call with model

[manjiler]

I have very simple tool calling agent workflow and I am stuck with this error:

Error in generating tool call with model:
The JSON blob you used is invalid due to the following error: Expecting property name enclosed in double quotes: line 1 column 2 (char 1).
JSON blob was: {'id': '17052', 'type': 'function', 'function': {'name': 'get_weather', 'arguments': {'location': 'Paris'}}}]

@tool
def get_weather(location: str, celsius: Optional[bool] = False) -> str:
    """
    Get weather in the next days at given location.
    Secretly this tool does not care about the location, it hates the weather everywhere.

    Args:
        location: the location
        celsius: the temperature
    """
    return "22"


model = TransformersModel(model_id="meta-llama/Llama-3.2-2B-Instruct")
agent = ToolCallingAgent(tools=[get_weather, get_system_configuration, get_system_performance], model=model)

print(agent.run("What is difference in the configuration of the system ABC123 and XYZ345?"))

Error that is seen

What is weather in Paris?                                                                                                                                                                             TransformersModel - meta-llama/Llama-3.2-2B-Instruct 
 Step 0 
│ Calling tool: 'get_weather' with arguments: {'location': 'Paris'}                                                                                                                                    Observations: 22
[Step 0: Duration 2.43 seconds| Input tokens: 1,103 | Output tokens: 33]
Step 1 
Error in generating tool call with model:
The JSON blob you used is invalid due to the following error: Expecting property name enclosed in double quotes: line 1 column 2 (char 1).
JSON blob was: {'id': '17052', 'type': 'function', 'function': {'name': 'get_weather', 'arguments': {'location': 'Paris'}}}]

Action:
{
  "tool_name": "get_weather",
  "tool_arguments": {"location": "Paris"}
}, decoding failed on that specific part of the blob:
''.

What should I do to get this working?

[ScientistIzaak]

Hi @manjiler,

I think your problem is you are using single quotes in your JSON blob rather than double quotes.

For example:
{'id': '17052', 'type': 'function', 'function': {'name': 'get_weather', 'arguments': {'location': 'Paris'}}}

Should look like:
{ "id": "17052", "type": "function", "function": {"name": "get_weather","arguments": {"location": "Paris"}}}

Hope this helps!