Update yo_scheduler.py to #!/usr/bin/env python3

[rodchristiansen]

This pull request upgrades the yo_scheduler script from Python 2 to Python 3. The primary objective is to ensure compatibility with modern Python environments while maintaining the existing functionality and structure of the script.

Changes Made

• Shebang Line Update: Updated the shebang line to use #!/usr/bin/env python3.
• Print Statement Conversion: Updated print statements to the Python 3 print() function.
• Exception Handling: Converted except syntax to be compatible with Python 3.
• Import Statements: Updated imports to comply with Python 3 standards.
• Dictionary Methods: Replaced dictionary method calls (e.g., dict.iteritems() to dict.items()).
• String Handling: Ensured all string handling is compatible with Python 3, including the use of bytes where necessary.
• Function Adjustments: Made necessary adjustments to functions and modules to ensure compatibility with Python 3 libraries.