sample_app.md

Sample App

from logEZ import MyLogger
import os

logger = MyLogger()

def read_data_from_file(file_path: str):
    if not os.path.exists(file_path):
        logger.error(f"File not found: {file_path}", exc_info=True)
        return None

    try:
        with open(file_path, 'r') as file:
            data = file.readlines()
        logger.info(f"Successfully read data from {file_path}")
    except Exception as e:
        logger.error(f"An error occurred while reading data from {file_path}", exc_info=True)
        return None

    return data

def calculate_average(numbers):
    try:
        average = sum(numbers) / len(numbers)
        logger.info(f"Calculated average: {average}")
        return average
    except ZeroDivisionError as e:
        logger.error(f"An error occurred while calculating the average", exc_info=True)
        return None
    except Exception as e:
        logger.error(f"An unexpected error occurred while calculating the average", exc_info=True)
        return None

def main():
    logger.info("Starting the application...")

    file_path = "data.txt"
    data = read_data_from_file(file_path)

    if data is not None:
        try:
            numbers = [float(x.strip()) for x in data]
        except ValueError as e:
            logger.critical("Failed to convert data to numbers. Terminating the application...", exc_info=True)
            return

        average = calculate_average(numbers)
        if average is not None:
            logger.info(f"The average of the numbers is {average}")

    logger.info("Ending the application...")

if __name__ == "__main__":
    main()

In this example, the application reads data from a file, converts the data into a list of numbers, and calculates the average of those numbers. The logEZ library is used to log messages at different logging levels, including info, error, and critical messages. The exc_info parameter is used to include complete execution information when logging error and critical messages.

When run, the output will look something like this (assuming the file data.txt does not exist):

01-04-23 15:45:36 - root : INFO : Starting the application...
01-04-23 15:45:36 - root : ERROR : File not found: data.txt
Traceback (most recent call last):
  File "example.py", line 6, in read_data_from_file
    if not os.path.exists(file_path):
FileNotFoundError: [Errno 2] No such file or directory: 'data.txt'
01-04-23 15:45:36 - root : INFO : Ending the application...

This output shows various log messages, including info and error messages, and includes the traceback for the FileNotFoundError exception because the exc_info parameter was set to True.