What is the role of Flask's g object?
Instruction: Describe the purpose and use of Flask's global `g` object.
Context: This question probes the candidate's understanding of Flask's `g` object, used for storing and sharing data during an application context.
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The g object in Flask is essentially a global namespace for holding any data you want to share across functions during a single app context or request cycle. It's a temporary storage that is accessible within the context of an application request. This means that the data stored in the g object is available and persists for the duration of a request, but once the request is over, the data is cleared...