Class: QgsExpressionNodeUnaryOperator

class qgis.core.QgsExpressionNodeUnaryOperator

Bases: QgsExpressionNode

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

QgsExpressionNodeUnaryOperator(op: QgsExpressionNodeUnaryOperator.UnaryOperator, operand: Optional[QgsExpressionNode]) A node unary operator is modifying the value of operand by negating it with op.

QgsExpressionNodeUnaryOperator(a0: QgsExpressionNodeUnaryOperator)

Methods

clone

rtype:

Optional[QgsExpressionNode]

dump

rtype:

str

evalNode

param parent:

isStatic

param parent:

nodeType

rtype:

QgsExpressionNode.NodeType

op

Returns the unary operator.

operand

Returns the node the operator will operate upon.

prepareNode

param parent:

referencedColumns

rtype:

Set[str]

referencedFunctions

rtype:

Set[str]

referencedVariables

rtype:

Set[str]

text

Returns a the name of this operator without the operands.

Attributes

uoMinus

uoNot

class UnaryOperator

Bases: int

clone(self) QgsExpressionNode | None
Return type:

Optional[QgsExpressionNode]

dump(self) str
Return type:

str

evalNode(self, parent: QgsExpression | None, context: QgsExpressionContext | None) Any
Parameters:
Return type:

Any

isStatic(self, parent: QgsExpression | None, context: QgsExpressionContext | None) 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 | None

Returns the node the operator will operate upon.

Return type:

Optional[QgsExpressionNode]

prepareNode(self, parent: QgsExpression | None, context: QgsExpressionContext | None) 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