ColumnGroups

class astropy.table.ColumnGroups(parent_column, indices=None, keys=None)[source]

Bases: astropy.table.groups.BaseGroups

Attributes Summary

indices

keys

Methods Summary

aggregate(func)

filter(func)

Filter groups in the Column based on evaluating function func on each group sub-table.

Attributes Documentation

indices
keys

Methods Documentation

aggregate(func)[source]
filter(func)[source]

Filter groups in the Column based on evaluating function func on each group sub-table.

The function which is passed to this method must accept one argument:

It must then return either True or False. As an example, the following will select all column groups with only positive values:

def all_positive(column):
    if np.any(column < 0):
        return False
    return True
Parameters
funcfunction

Filter function

Returns
outColumn

New column with the aggregated rows.