Fix indentation error in core/plot.py and update app.py for correct data passing.

Update core/models.py

Update core/models.py

Update core/models.py

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Update core/models.py

Update core/models.py

Update core/models.py

Update core/models.py

Update core/models.py

Update core/models.py

Update core/models.py

Update core/models.py

Update core/models.py

Update core/models.py

Create models.py