Update main.sh

[SilentJMA]

In this enhanced version of the main.sh script, several improvements have been made to enhance its reliability, readability, and functionality:

Error Handling: The script now includes robust error handling mechanisms. It checks for errors during the virtual environment setup, activation, and package installation. If any of these steps fail, it provides informative error messages and exits gracefully.

Logging: The script features informative log messages that provide insights into its execution. These messages help with debugging and understanding the progress of the script.

Consistent Formatting: The script adheres to consistent formatting and indentation, following best practices for shell scripts to make it more readable and maintainable.

Comments: To improve clarity and comprehension, comments have been added to explain the purpose of each section of the script, making it easier to understand and modify.

Parallel Processing: The script processes universities from the unis.yml file in parallel, which can significantly improve execution time when dealing with a large number of universities.

Virtual Environment Management: The script now includes functions for creating and activating a virtual environment. If the virtual environment doesn't exist, it is created, and the required packages are installed. This ensures a clean and isolated environment for running the Python script.

Deactivation Handling: The script attempts to deactivate the virtual environment upon completion. In case of any issues with deactivation, it provides a warning message but continues execution.

These improvements collectively enhance the script's robustness, readability, and maintainability, making it a more reliable tool for processing university data.