modin.pandas.DataFrameGroupBy.size¶

DataFrameGroupBy.size()[source] (https://github.com/snowflakedb/snowpark-python/blob/v1.47.0/.tox/docs/lib/python3.9/site-packages/modin/pandas/groupby.py#L1303-L1328)¶

Compute group sizes.

Returns:: Number of rows in each group as a Series if as_index is True or a DataFrame if as_index is False.
Return type:: DataFrame or Series

Examples

>>> data = [[1, 2, 3], [1, 5, 6], [7, 8, 9]]
>>> df = pd.DataFrame(data, columns=["a", "b", "c"],
...                   index=["owl", "toucan", "eagle"])
>>> df
        a  b  c
owl     1  2  3
toucan  1  5  6
eagle   7  8  9
>>> df.groupby("a").size()
a
1    2
7    1
dtype: int64

For SeriesGroupBy:

>>> data = [[1, 2, 3], [1, 5, 6], [7, 8, 9]]
>>> df = pd.DataFrame(data, columns=["a", "b", "c"],
...                   index=["owl", "toucan", "eagle"])
>>> df
        a  b  c
owl     1  2  3
toucan  1  5  6
eagle   7  8  9
>>> df.groupby("a")["b"].size()
a
1    2
7    1
Name: b, dtype: int64