> ## Documentation Index
> Fetch the complete documentation index at: https://wb-21fd5541-sdk-testing-latest.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.
# Table
export const GitHubLink = ({url}) =>
GitHub source
;
## class Table
```python theme={null}
(columns=None, data=None, rows=None, dataframe=None, dtype=None, optional=True, allow_mixed_types=False,
log_mode: "Literal['IMMUTABLE', 'MUTABLE', 'INCREMENTAL'] | None" = 'IMMUTABLE')
```
## Description
The Table class used to display and analyze tabular data.
Unlike traditional spreadsheets, Tables support numerous types of data:
scalar values, strings, numpy arrays, and most subclasses of `wandb.data_types.Media`.
This means you can embed `Images`, `Video`, `Audio`, and other sorts of rich, annotated media
directly in Tables, alongside other traditional scalar values.
This class is the primary class used to generate W\&B Tables
[https://docs.wandb.ai/models/tables](https://docs.wandb.ai/models/tables)
## Args
* `columns`: (List\[str]) Names of the columns in the table. Defaults to \["Input", "Output", "Expected"].
* `data`: (List\[List\[any]]) 2D row-oriented array of values.
* `rows`: (List\[List\[any]]) 2D row-oriented array of values.
* `dataframe`: (pandas.DataFrame) DataFrame object used to create the table. When set, `data` and `columns` arguments are ignored.
* `dtype`:
* `optional`: (Union\[bool,List\[bool]]) Determines if `None` values are allowed. Default to True - If a singular bool value, then the optionality is enforced for all columns specified at construction time - If a list of bool values, then the optionality is applied to each column - should be the same length as `columns` applies to all columns. A list of bool values applies to each respective column.
* `allow_mixed_types`: (bool) Determines if columns are allowed to have mixed types (disables type validation). Defaults to False
* `log_mode`: Optional\[str] Controls how the Table is logged when mutations occur.
## Methods
### method add\_column
```python theme={null}
(self, name, data, optional=False)
```
Adds a column of data to the table.
##### Arguments
* `name`: (str) - the unique name of the column
* `data`: (list | np.array) - a column of homogeneous data
* `optional`: (bool) - if null-like values are permitted
### method add\_computed\_columns
```python theme={null}
(self, fn)
```
Adds one or more computed columns based on existing data.
##### Arguments
* `fn`: A function which accepts one or two parameters, ndx (int) and row (dict), which is expected to return a dict representing new columns for that row, keyed by the new column names. - `ndx` is an integer representing the index of the row. Only included if `include_ndx` is set to `True`. - `row` is a dictionary keyed by existing columns
### method add\_data
```python theme={null}
(self, *data)
```
Adds a new row of data to the table.
The maximum amount ofrows in a table is determined by
`wandb.Table.MAX_ARTIFACT_ROWS`.
The length of the data should match the length of the table column.
##### Arguments
* `data`:
### method add\_row
```python theme={null}
(self, *row)
```
Deprecated. Use `Table.add_data` method instead.
##### Arguments
* `row`:
### method cast
```python theme={null}
(self, col_name, dtype, optional=False)
```
Casts a column to a specific data type.
This can be one of the normal python classes, an internal W\&B type,
or an example object, like an instance of wandb.Image or
wandb.Classes.
##### Arguments
* `col_name`: The name of the column to cast.
* `dtype`: The target dtype.
* `optional`: If the column should allow Nones.
### method get\_column
```python theme={null}
(self, name, convert_to=None)
```
Retrieves a column from the table and optionally converts it to a NumPy object.
##### Arguments
* `name`: (str) - the name of the column
* `convert_to`: (str, optional)
### method get\_dataframe
```python theme={null}
(self)
```
Returns a `pandas.DataFrame` of the table.
### method get\_index
```python theme={null}
(self)
```
Returns an array of row indexes for use in other tables to create links.