Name

The following methods are available under the expr.name attribute.

Expr.name.keep()	Keep the original root name of the expression.
Expr.name.map(function)	Rename the output of an expression by mapping a function over the root name.
Expr.name.prefix(prefix)	Add a prefix to the root column name of the expression.
Expr.name.suffix(suffix)	Add a suffix to the root column name of the expression.
Expr.name.to_lowercase()	Make the root column name lowercase.
Expr.name.to_uppercase()	Make the root column name uppercase.