tabsdata.tableframe.selectors.first

first() → SelectorProxy

Select the first column in the TableFrame.

Example

>>> import tabsdata.tableframe as td_tf
>>>
>>> tf = td_tf.TableFrame({
...     "Id": [101, 102, 103, 104, 105, 106, 107, 108],
...     "Name": ["A", "B", "C", "D", "E", "F", "G", "H"],
...     "Score": [90.5, 84.0, 87.0, 91.5, 86.5, 88.0, 85.5, 89.0]
... })

Original: ┌─────┬──────┬───────┐ │ Id ┆ Name ┆ Score │ │ — ┆ — ┆ — │ │ i64 ┆ str ┆ f64 │ ╞═════╪══════╪═══════╡ │ 101 ┆ “A” ┆ 90.5 │ │ 102 ┆ “B” ┆ 84.0 │ │ 103 ┆ “C” ┆ 87.0 │ │ 104 ┆ “D” ┆ 91.5 │ │ 105 ┆ “E” ┆ 86.5 │ │ 106 ┆ “F” ┆ 88.0 │ │ 107 ┆ “G” ┆ 85.5 │ │ 108 ┆ “H” ┆ 89.0 │ └─────┴──────┴───────┘

>>> tf.select(td_tf.selectors.first())

Selected: ┌─────┐ │ Id │ │ — │ │ i64 │ ╞═════╡ │ 101 │ │ 102 │ │ 103 │ │ 104 │ │ 105 │ │ 106 │ │ 107 │ │ 108 │ └─────┘