Variable handling functions

Feature-engine functions for finding variables of a specific type or ensuring that the variables are of the correct type.

The functions take a dataframe as an argument and return the names of the variables in the desired type.

You can also pass a dataframe with a list of variables to check if they are all of the desired type.

These functions are used under the hood by all Feature-engine transformers to select the variables that they will modify or operate with.

• find_all_variables
• find_categorical_and_numerical_variables
• find_or_check_categorical_variables
• find_or_check_datetime_variables
• find_or_check_numerical_variables