concepts.dsl.expression.cvt_expression

cvt_expression(expr, dtype=None)

Convert an expression compatible object to an expression. Acceptable types are:

• Expression.

• Variable: return a VariableExpression.

• str: return a ConstantExpression with the given constant string name, or a ObjectConstantExpression if the dtype is a ObjectType.

• ObjectConstant: return a ObjectConstantExpression.

• bool, int, float, torch.Tensor: return a ConstantExpression.

• ValueBase: return a ConstantExpression.

Parameters:

• expr (Expression | Variable | str | ObjectConstant | bool | int | float | Tensor | ValueBase) – the expression compatible object.

• dtype (ObjectType | ValueType | None) – the expected data type of the expression. If not given, the dtype will be inferred from the given object.

Returns:

the converted expression.

Raises:

TypeError – if the given object is not an expression compatible object.

Return type:

Expression