Conditional Propagate

../../../../_images/either.svg

Propagates one input or the other depending on a configurable predicate function.

Documentation

This node takes a configurable predicate function (a function that returns True or False) from the configuration and uses it to decide which input to return to the output.

The function is applied to the input data for the node. So for example if the input port is connected to a table port the argument of the lambda will be a sympathy.api.table.File. Have a look at the Data type APIs to see what methods and attributes are available on the data type that you are working with.

If the lambda function returns True, the data from the first port is written to the output, otherwise the data from the second port is written to the output.

Definition

Input ports

true
Type: <a>
Description: First, returned if predicate held true
false
Type: <a>
Description: Second, returned if predicate did not hold true
data
Type: <b>
Description: Data for the predicate comparison

Output ports

output
Type: <a>
Description: Output, First if the predicate holds true otherwise Second

Configuration

Condition function (predicate)

Function, called with data to determine which input to output. Should return a boolean

Examples

Example flows demonstrating this node:

Implementation

class node_filter_list.ConditionalPropagate[source]