Pydantic BaseModel Problem

import requests
from pydantic import BaseModel, Field
import datetime

# Define the input schema
class OpenMeteoInput(BaseModel):
    latitude: float = Field(..., description="Latitude of the location to fetch weather data for")
    longitude: float = Field(..., description="Longitude of the location to fetch weather data for")

def get_current_temperature(latitude: float, longitude: float) -> dict:
    """Fetch current temperature for given coordinates."""
    BASE_URL = ""
    # Parameters for the request
    params = {
        'latitude': latitude,
        'longitude': longitude,
        'hourly': 'temperature_2m',
        'forecast_days': 1,

    # Make the request
    response = requests.get(BASE_URL, params=params)
    if response.status_code == 200:
        results = response.json()
        raise Exception(f"API Request failed with status code: {response.status_code}")

    current_utc_time = datetime.datetime.utcnow()
    time_list = [datetime.datetime.fromisoformat(time_str.replace('Z', '+00:00')) for time_str in results['hourly']['time']]
    temperature_list = results['hourly']['temperature_2m']
    closest_time_index = min(range(len(time_list)), key=lambda i: abs(time_list[i] - current_utc_time))
    current_temperature = temperature_list[closest_time_index]
    return f'The current temperature is {current_temperature}°C'

The above code segment is from the course. I tried to run this script on my local machine but I am receiving the following error:

ValidationError: 1 validation error for StructuredTool
  subclass of BaseModel expected (type=type_error.subclass; expected_class=BaseModel)

Is this a known bug? Should I change the version of my Pydantic installation or etc.?

I couldn’t exactly figure out the problem but I guess it is fixed after replacing pydantic installation with

pip install pydantic==1.10.8
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