The Fix Pattern

Whenever you find an old m['world_x'] or m['world_y'] access, you fix it by pulling from the properties dictionary.

The Fix Pattern

Any value that is not id, parent_id, type, or name is now nested inside the properties column.

Old Code:

codePython

x = m['world_x']
y = m['world_y']
sym = m['symbol']

New Code:

codePython

props = m.get('properties', {})
x = props.get('world_x', 0)
y = props.get('world_y', 0)
sym = props.get('symbol', 'star')

Quick Checklist for the Refactor:

1. Extract the dict first: Always get props = m.get('properties', {}) at the top of your loop or function.

2. Update coordinates: Change all world_x and world_y calls.

3. Update metadata: If you see m['metadata']['something'], it is now just props.get('something') (no more double-nesting).

4. Check for : Use .get(key, default) to prevent the program from crashing if a node is missing a specific property.