Houdini 18.5 Executing tasks with PDG/TOPs pdg

pdg.CookError class

Generic exception raised when an error running the graph.

Raise this error inside Python node scripts (for example, on the Python Processor node), to stop processing and make the TOP node signal an error.

For example, in a Python Processor node’s onGenerate snippet:

import pdg

# Get the number of new items to create for each incoming item
per_item = self["peritem"].evaluateInt()

if per_item > 16:
    # Too many!
    raise pdg.CookError(
        "Can't create more than 16 items per incoming item"
    )

# Go on to create new items...

pdg

attributes

cooking

data

events

exceptions

  • pdg.AttribError

    Generic exception raised when an error occurs when accessing work item attributes

  • pdg.CookError

    Generic exception raised when an error running the graph.

  • pdg.ServiceError

    Generic exception raised when an error occurs during a PDG service manager operation

expressions

  • pdg.EvaluationContext

    A module with global functions that operate on the thread-local evaluation context

internal

nodes

schedulers

services

types

workitems