pandas.api.indexers.FixedForwardWindowIndexer — pandas 2.2.3 documentation (original) (raw)

class pandas.api.indexers.FixedForwardWindowIndexer(index_array=None, window_size=0, **kwargs)[source]#

Creates window boundaries for fixed-length windows that include the current row.

Examples

df = pd.DataFrame({'B': [0, 1, 2, np.nan, 4]}) df B 0 0.0 1 1.0 2 2.0 3 NaN 4 4.0

indexer = pd.api.indexers.FixedForwardWindowIndexer(window_size=2) df.rolling(window=indexer, min_periods=1).sum() B 0 1.0 1 3.0 2 2.0 3 4.0 4 4.0

Methods