datatable.FExpr.__eq__()

datatable.FExpr.

__eq__

(

x

,

y

)

source

Compare whether values in columns x and y are equal.

Like all other FExpr operators, the equality operator is elementwise: it produces a column where each element is the result of comparison x[i] == y[i].

If x or y are multi-column expressions, then they must have the same number of columns, and the == operator will be applied to each corresponding pair of columns. If either x or y are single-column while the other is multi-column, then the single-column expression will be repeated to the same number of columns as its opponent.

The equality operator can be applied to columns of any type, and the types of x and y are allowed to be different. In the latter case the columns will be converted into a common stype before the comparison. In practice it means, for example, that `1 == "1".

Lastly, the comparison x == None is exactly equivalent to the isna() function.

Parameters

x

,

y

FExpr

The arguments must be either FExprs, or expressions that can be converted into FExprs.

return

FExpr

An expression that evaluates x == y. The produced column will have stype bool8.