While building dbt-core- sql-python pipe with following code in .py file , getting error as - "dbt allows exactly one model defined per python file, found 0"

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1

import numpy as np
import pandas as pd

def my_first_python_model(dbt, session):

dbt configuration

dbt.config(
materialized=‘table’,
description=‘My_first_Python_model’,
tags=[‘python’]
)

# get upstream data
my_first_dbt_model_result = dbt.ref("my_first_dbt_model").to_pandas()

# Additional Python-based transformations
# Concatenate columns 'FirstName', 'MiddleName', and 'LastName' into a new column 'FullName'
my_first_dbt_model_result['FullName'] = my_first_dbt_model_result[['FirstName', 'MiddleName', 'LastName']].apply(lambda x: ' '.join(x.dropna()), axis=1)

# Print the transformed DataFrame
print(my_first_dbt_model_result[['FullName']])

# Return the DataFrame as a dbt table
return my_first_dbt_model_result[['FullName']]