mrv.dge

Module dge

Classes

[hide private]

_PlugShell
Handles per-node-instance plug connection setup and storage.

Graph
Holds the nodes and their connections

_NodeBaseCheckMeta
Class checking the consistency of the nodebase class before it is being created

NodeBase
Base class that provides support for plugs to the superclass.

Exceptions

ConnectionError
Exception base for all plug related errors

PlugIncompatible
Thrown whenever plugs are not compatible with each other during connection

PlugAlreadyConnected
Thrown if one tries to connect a plug to otherplug when otherplug is already connected

AccessError
Base class for all errors indicating invalid access

NotWritableError
Thrown if a non-writable plug is being written to

NotReadableError
Thrown if a non-readable attribute is being read

MissingDefaultValueError
Thrown if a default value is missing for input attributes that are not connected

ComputeError
Thrown if the computation done by a plug failed by an unknown exception It will be passed on in the exception

ComputeFailed
Raised by the derived class computing a value if the computational goal cannot be achieved ( anymore )

PlugUnhandled
Raised if a plug was not handled by the node's compute method

END Plugs and Attributes

Attribute
Simple class defining the type of a plug and several flags that affect it.

iPlug
Defines an interface allowing to compare compatabilies according to types.

plug
Defines an interface allowing to compare compatabilies according to types.

Functions

[hide private]

Iterators

iterShells(rootPlugShell, stopAt=<function <lambda> at 0x2f55410>, prune=<function <lambda> at 0x2f55488>, direction='up', visit_once=False, branch_first=False)
Iterator starting at rootPlugShell going "up"stream ( input ) or "down"stream ( output ) breadth first over plugs, applying filter functions as defined. source code

Variables

[hide private]

__package__ = 'mrv'

Function Details

[hide private]

iterShells(rootPlugShell, stopAt=<function <lambda> at 0x2f55410>, prune=<function <lambda> at 0x2f55488>, direction=`'up'`, visit_once=False, branch_first=False)

source code

Iterator starting at rootPlugShell going "up"stream ( input ) or "down"stream ( output ) breadth first over plugs, applying filter functions as defined.

Parameters:

rootPlugShell - shell at which to start the traversal. The root plug will be returned as well
stopAt - if function returns true for given PlugShell, iteration will not proceed at that point ( possibly continuing at other spots ). Function will always be called, even if the shell would be pruned as well. The shell serving as stop marker will not be returned
prune - if function returns true for given PlugShell, the shell will not be returned but iteration continues.
direction - traversal direction "up" upstream, in direction of inputs of plugs "down" downstream, in direction of outputs of plugs
visit_once - if True, plugs will only be returned once, even though they are
branch_first - if True, individual branches will be travelled first ( thuse the node will be left quickly following the datastream ). If False, the plugs on the ndoe will be returned first before proceeding to the next node encountered several times as several noodes are connected to them in some way.

Module dge

iterShells(rootPlugShell, stopAt=<function <lambda> at 0x2f55410>, prune=<function <lambda> at 0x2f55488>, direction='up', visit_once=False, branch_first=False)

iterShells(rootPlugShell, stopAt=<function <lambda> at 0x2f55410>, prune=<function <lambda> at 0x2f55488>, direction=`'up'`, visit_once=False, branch_first=False)