How to write test code in databricks

[rt-slowth]

from databricks.connect import DatabricksSession
from data.dbx_conn_info import DbxConnInfo

class SparkSessionManager:

    _instance = None
    _spark = None

    def __new__(cls):
        if cls._instance is None:
            cls._instance = super(SparkSessionManager, cls).__new__(cls)
        return cls._instance

    def get_spark_session(self):
        if not self._spark:
            self._spark = DatabricksSession.builder.remote(
                host=f"https://{DbxConnInfo.retrieve_workspace_instance_name()}",
                token=DbxConnInfo.retrieve_token(),
                cluster_id=DbxConnInfo.retrieve_cluster_id()
            ).getOrCreate()
        return self._spark

When I write and run test code for this code, it keeps telling me that the databricks package doesn't exist. I don't know why.

[Kaniz]

Hi @rt-slowth , 

The databricks-connect module is not included by default in Python installations, so you must ensure it is installed before your code can import it.

You can install databricks-connect using pip.

Please run the following command in your terminal or command prompt and then try rerunning your code:

pip install 
databricks-connect

Additionally, make sure that you have also installed all the necessary packages that are required to run your code, including any custom packages that are used in the DbxConnInfo class.

If the data.dbx_conn_info module is not found, it could indicate an error in the module itself or that it is in a different location than where your code expects it to be.

Make sure that the DbxConnInfo class is located in the correct folder, and the folder is included in the Python path. You can verify the way by running the following code in your notebook:

import sys
print(sys.path)

If the folder containing the data The module is not in the list of system paths,; you can add it using the following code:

import sys
sys.path.append('/path/
to/data/module')

Replace /path/to/data/module with the actual path to the folder that contains the dbx_conn_info.py file.