How to log the Exception message using by logging module?

In the context of Python programming language, to handle the exceptions and log their message in Python programming language, you can use the logging module. The logging module can provide a flexible framework for emitting log messages from Python programs. You can configure different log handles and formats to customize how log messages are displayed and stored.

Here is the updated code with the detailed technical terms and a long example:-

Import the logging module.

Configuration of the logging setting.

Iterate over the data source.

Use a try block to handle potential exceptions during the data processing.

In the except block, you can retrieve the exception message and log it by using the logging module.

Import logging

# Step 1: Import the logging module

# Step 2: Configure logging settings

Logging.basicConfig(

    Level=logging.ERROR,                 # Set the logging level to ERROR

    Format=’%(asctime)s - %(levelname)s - %(message)s’,  # Define the log format

    Handlers=[

        Logging.FileHandler(“error.log”),   # Log output to a file named “error.log”

        Logging.StreamHandler()             # Log output to the console

    ]

)

# List of data sources

Data_sources = [“source1”, “source2”, “source3”]

# Step 3: Iterate over the data sources

For source in data_sources:

    Try:

        # Step 4: Simulating data processing

        If source == “source2”:

            Raise ValueError(“Invalid data from source2”)

        Print(f”Processed data from {source}”)

    Except Exception as e:

        # Step 5: Retrieve and log the exception message

        Exception_message = str€  # Retrieve the exception message from the exception object

        Logging.error(f”Error processing data from {source}: {exception_message}”)

Here is an example given below of how you can handle exceptions and log their message in Java by using the java.util.logging package. This would include detailed comments to explain each step:-

Import java.io.IOException;

Import java.util.logging.FileHandler;

Import java.util.logging.Level;

Import java.util.logging.Logger;

Import java.util.logging.SimpleFormatter;

Public class DataProcessor {

    // Step 1: Create a Logger instance

    Private static final Logger logger = Logger.getLogger(DataProcessor.class.getName());

    Public static void main(String[] args) {

        // Step 2: Configure the Logger

        configureLogger();

        // List of data sources

        String[] dataSources = {“source1”, “source2”, “source3”};

        // Step 3: Iterate over the data sources

        For (String source : dataSources) {

            Try {

                // Step 4: Simulate data processing

                processData(source);

                System.out.println(“Processed data from “ + source);

            } catch (Exception e) {

                // Step 5: Retrieve and log the exception message

                String exceptionMessage = e.getMessage(); // Retrieve the exception message

                Logger.log(Level.SEVERE, “Error processing data from “ + source + “: “ + exceptionMessage, e);

            }

        }

    }

    Private static void configureLogger() {

        Try {

            // Step 2.1: Create a FileHandler to log messages to a file

            FileHandler fileHandler = new FileHandler(“error.log”, true);

            // Step 2.2: Set a simple formatter for the FileHandler

            fileHandler.setFormatter(new SimpleFormatter());

            // Step 2.3: Add the FileHandler to the Logger

            Logger.addHandler(fileHandler);

            // Step 2.4: Set the logging level to SEVERE

            Logger.setLevel(Level.SEVERE);

        } catch (IOException e) {

            // Handle potential IOException from FileHandler

            e.printStackTrace();

        }

    }

    Private static void processData(String source) throws Exception {

        // Simulate data processing

        If (“source2”.equals(source)) {

            Throw new ValueError(“Invalid data from source2”);

        }

    }

    // Custom exception class to simulate ValueError

    Static class ValueError extends Exception {

        Public ValueError(String message) {

            Super(message);

        }

    }

}