openclean.operator.transform.apply module
Apply operator for data frames.
- class openclean.operator.transform.apply.Apply(columns, func)
Bases:
openclean.operator.base.DataFrameTransformerApply function for data frames. Returns a modified data frame where values in the specified columns have been modified using the given apply function.
The apply function can be an apply factory. In this case, a separate instance of the function is generated and applied to each column.
- transform(df)
Return a data frame where all values in the specified columns have been modified by the apply function.
- Parameters
df (pandas.DataFrame) – Input data frame.
- Return type
pandas.DataFrame
- openclean.operator.transform.apply.apply(df, columns, func)
Apply function for data frames. Returns a modified data frame where values in the specified columns have been modified using the given apply function.
The apply function can be an apply factory. In this case, a separate instance of the function is generated and applied to each column.
- Parameters
df (pandas.DataFrame) – Input data frame.
columns (int, string, or list(int or string), optional) – Single column or list of column index positions or column names.
func (callable or openclean.function.eval.base.ApplyFactory) – Callable that accepts a single value or a fatory that creates such a callable.
- Return type
pandas.DataFrame