Filters

Expr.filter(*predicates)	Apply a filter predicate to an expression.
Expr.slice(offset[, length])	Compute a slice of the TableFrame for the specified columns.

TableFrame.extract_as_columns(offset, length)	Extract a slice of rows from the table as a column-oriented dictionary.
TableFrame.extract_as_rows(offset, length)	Extract a slice of rows from the TableFrame as a list of dictionaries.
TableFrame.filter(*predicates)	Filter the TableFrame based on the given predicates.
TableFrame.first()	Return a TableFrame with the first row.
TableFrame.first_row([named])	Return a tuple or dictionary with the first row, or None if no row.
TableFrame.head([n])	Return a TableFrame with the first n rows.
TableFrame.last()	Return a TableFrame with the last row.
TableFrame.last_row([named])	Return a tuple or dictionary with the last row, or None if no row.
TableFrame.limit([n])	Return a TableFrame with the first n rows.
TableFrame.slice(offset[, length])	Return a TableFrame with a slice of the original TableFrame
TableFrame.tail([n])	Return a TableFrame with the last n rows.
TableFrame.unique([subset, keep, maintain_order])	Deduplicate rows from the TableFrame.