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- import numpy as np
- from pandas import (
- Categorical,
- Series,
- )
- def test_nunique():
- # basics.rst doc example
- series = Series(np.random.randn(500))
- series[20:500] = np.nan
- series[10:20] = 5000
- result = series.nunique()
- assert result == 11
- def test_nunique_categorical():
- # GH#18051
- ser = Series(Categorical([]))
- assert ser.nunique() == 0
- ser = Series(Categorical([np.nan]))
- assert ser.nunique() == 0
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