code: def test_series_describe_single():
      ts = Series(
          np.arange(10, dtype=np.float64),
          index=date_range("2020-01-01", periods=10),
      )
      grouped = ts.groupby(lambda x: x.month)
      result = grouped.apply(lambda x: x.describe())
      expected = grouped.describe().stack(future_stack=True)
      tm.assert_series_equal(result, expected)
  
file_path: pandas/pandas/tests/groupby/methods/test_describe.py
imports: import numpy
  import pytest
  import pandas
  from pandas import DataFrame, Index, MultiIndex, Series, Timestamp, date_range
  import pandas._testing
label_desc: Use image node_id 3 for calling a global function with example usage: test_series_describe_single() without return types