Class: QgsExpressionNodeUnaryOperator

class qgis.core.QgsExpressionNodeUnaryOperator(op: QgsExpressionNodeUnaryOperator.UnaryOperator, operand: QgsExpressionNode)

Bases: QgsExpressionNode

A node unary operator is modifying the value of operand by negating it with op.

QgsExpressionNodeUnaryOperator(QgsExpressionNodeUnaryOperator)

A unary node is either negative as in boolean (not) or as in numbers (minus).

Parameters
class UnaryOperator

Bases: int

clone(self)QgsExpressionNode
Return type

QgsExpressionNode

dump(self) → str
Return type

str

evalNode(self, parent: QgsExpression, context: QgsExpressionContext) → Any
Parameters
Return type

Any

isStatic(self, parent: QgsExpression, context: QgsExpressionContext) → bool
Parameters
Return type

bool

nodeType(self)QgsExpressionNode.NodeType
Return type

QgsExpressionNode.NodeType

op(self)QgsExpressionNodeUnaryOperator.UnaryOperator

Returns the unary operator.

Return type

QgsExpressionNodeUnaryOperator.UnaryOperator

operand(self)QgsExpressionNode

Returns the node the operator will operate upon.

Return type

QgsExpressionNode

prepareNode(self, parent: QgsExpression, context: QgsExpressionContext) → bool
Parameters
Return type

bool

referencedColumns(self) → Set[str]
Return type

Set[str]

referencedFunctions(self) → Set[str]
Return type

Set[str]

referencedVariables(self) → Set[str]
Return type

Set[str]

text(self) → str

Returns a the name of this operator without the operands. I.e. “NOT” or “-“

Return type

str

uoMinus = 1
uoNot = 0