refactor: get bus_demand via Scenario method instead of import

[danielolsen]

Pull Request doc

Purpose

Get bus_demand via the Scenario.get_bus_demand() method instead of importing the get_bus_demand function, which is being removed in Breakthrough-Energy/PowerSimData#581. Closes #327.

Testing

Tested manually. With the PowerSimData branch for the PR installed:

>>> from powersimdata import Scenario
>>> from postreise.analyze.transmission.congestion import calculate_congestion_surplus
>>> calculate_congestion_surplus(Scenario(3873))
UTC
2016-10-01 00:00:00    272789.533136
2016-10-01 01:00:00    272558.733281
2016-10-01 02:00:00    252855.877419
2016-10-01 03:00:00    248522.565691
2016-10-01 04:00:00    231332.804519
                           ...
2016-10-31 19:00:00    519741.613030
2016-10-31 20:00:00    554901.191273
2016-10-31 21:00:00    533267.041210
2016-10-31 22:00:00    456426.344775
2016-10-31 23:00:00    416862.087360
Freq: H, Length: 744, dtype: float64

Time estimate

1 minute.

[BainanXia]

Tests are failing due to black upgrade and functions calls from calculate_congestion_surplus which is as expected.

[danielolsen]

Tests are failing due to black upgrade and functions calls from calculate_congestion_surplus which is as expected.

calculate_congestion_surplus fails because MockAnalyze doesn't have get_bus_demand! I need to add that to Breakthrough-Energy/PowerSimData#581 as well.

[danielolsen]

Tests have been updated to reflect the new expected behavior from Scenario.get_bus_demand for a Scenario in Analyze state. With the Breakthrough-Energy/PowerSimData#581 branch checked out, tests pass locally.

[BainanXia]

All tests passed with the corresponding branch checked out.