Conditional

Conditional operations are those were the goal is to check if a preset condition is real or not. This kind of operations have to operators: If and Nvl

class vtlengine.Operators.Conditional.If

If class:

If-then-else operator inherits from Operator, a superclass that contains general validate and evaluate class methods. It has the following class methods:

Class methods:

evaluate: Evaluates if the operation is well constructed, checking the actual condition and dropping a boolean result. The result will depend on the data class, such as datacomponent and dataset.

component_level_evaluation: Returns a pandas dataframe with data to set the condition

dataset_level_evaluation: Sets the dataset and evaluates its correct schema to be able to perform the condition.

validate: Class method that has two branches so datacomponent and datasets can be validated. With datacomponent, the code reviews if it is actually a Measure and if it is a binary operation. Dataset branch reviews if the identifiers are the same in ‘if’, ‘then’ and ‘else’.

class vtlengine.Operators.Conditional.Nvl

Null class:

`Nvl <https://sdmx.org/wp-content/uploads/VTL-2.1-Reference-Manual.pdf#page=229&zoom=100,72,370>`_operator class. It has the following class methods:

Class methods:

Validate: Class method that validates if the operation at scalar, datacomponent or dataset level can be performed. Evaluate: Evaluates the actual operation, returning the result.