---------------------------------------------------------------------------
AssertionError                            Traceback (most recent call last)
Cell In[14], line 1
----> 1 n.statistics.revenue(
      2     groupby=["name", "bus", "carrier"], at_port=True, groupby_time=True
      3 ).loc["Link", :, "RS00", ["gas-ccgt", "gas-conv", "lignite"]]

File ~/micromamba/envs/easteregg/lib/python3.12/site-packages/pypsa/statistics/expressions.py:249, in StatisticHandler.__call__(self, *args, **kwargs)
    248 def __call__(self, *args: Any, **kwargs: Any) -> pd.DataFrame:  # noqa: D102
--> 249     return self._bound_method(*args, **kwargs)

File ~/micromamba/envs/easteregg/lib/python3.12/site-packages/pypsa/common.py:529, in deprecated_kwargs.<locals>.deco.<locals>.wrapper(*args, **kwargs)
    524 @functools.wraps(f)
    525 def wrapper(*args: Any, **kwargs: Any) -> Any:
    526     rename_deprecated_kwargs(
    527         f.__name__, kwargs, aliases, deprecated_in, removed_in
    528     )
--> 529     return f(*args, **kwargs)

File ~/micromamba/envs/easteregg/lib/python3.12/site-packages/pypsa/statistics/expressions.py:2366, in StatisticsAccessor.revenue(self, components, groupby_time, groupby_method, aggregate_across_components, groupby, at_port, carrier, bus_carrier, nice_names, drop_zero, round, direction)
   2363     weights = n.snapshot_weightings.objective
   2364     return self._aggregate_timeseries(revenue, weights, agg=groupby_time)
-> 2366 df = self._aggregate_components(
   2367     func,
   2368     components=components,
...
-> 1071     assert callable(self.func)
   1073     series_gen = self.series_generator
   1074     res_index = self.result_index

AssertionError: 

# fails
n.statistics.revenue(groupby_time=True)

# works
n.statistics.revenue()
n.statistics.revenue(groupby_time=False)