require_columns

function of dascore.utils.tables

source

require_columns(
    frame: DataFrame ,
    needed ,
    path: Path ,
)-> ‘None’

Refuse a table which does not carry a column it is read by.

Parameters

Parameter	Description
frame	The table to check.
needed	The column names required; a None is ignored, so a caller may pass an optional column straight through.
path	The file the table was read from, for the error message.

Examples

import pandas as pd
from pathlib import Path
from dascore.utils.tables import require_columns
frame = pd.DataFrame({"sequence": [1]})
require_columns(frame, ["sequence", None], Path("t/x.csv")) is None

True