Table

Table is Perspective's columnar data frame, analogous to a Pandas DataFrame or Apache Arrow, supporting append & in-place updates, removal by index, and update notifications.

A Table contains columns, each of which have a unique name, are strongly and consistently typed, and contains rows of data conforming to the column's type. Each column in a Table must have the same number of rows, though not every row must contain data; null-values are used to indicate missing values in the dataset. The schema of a Table is immutable after creation, which means the column names and data types cannot be changed after the Table has been created. Columns cannot be added or deleted after creation either, but a View can be used to select an arbitrary set of columns from the Table.