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#!c:\Python27\python
"""The Command Pattern

An illustration of how the Command Pattern can be used
to facilitate scripting and multi-level undo/redo.

In this example, the user works against an in-memory
datastore, DATASTORE (see below); creates, modified and
deletes values, while the Invoker keeps track of what
happens in which order; the user may then undo previous

mottosso

class Request(object):
    def __call__(self, *args, **kwargs):
        return self.request_first(*args, **kwargs)

    def __init__(self, **kwargs):
        self.__slots = []

    def request(self, *args, **kwargs):
        """Return generator, yielding one return value per slot"""
        for subs in self.__slots:

mottosso

class Request(object):
    """
    In contrast to Signal, this object emits a request for data.
    The observer(s) then transmits requested data.

    If there is more than one observer, each observer transmits
    requested until no more data exists. That way, a minimal amount
    of observers will ever have to process.

    Example

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# Mirror transform

from maya import cmds


def mirror_transforms(nodes):
    """Mirror transforms `nodes` across the YZ axis

    Arguments:
        nodes (list): Transforms to be mirrored

mottosso

"""
This example is part of a comment from a Pyblish pull-request, #71
https://github.com/abstractfactory/pyblish/pull/72

"""

import os
import pyblish.backend.plugin

context = pyblish.backend.plugin.Context()

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"""
Given a node following the convention <side>_<name>_<suffix>, look for an
equivalent side with matching suffix and transfer attribute values across.

.. note:: This assumes controllers are mirrored by *behaviour*; i.e.
    Identical values produce mirrored results.

"""

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"""Store and restore default values

Current keyable values are stored in a `defaults` attribute
within each node using `store()` and later restored using
`restore()`. This way, channels which could otherwise not
have a native default value (such as plain transform and rotate)
may carry defaults alongside user-defined attributes.

"""

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import pyblish.api

from maya import cmds

class SelectSelected(pyblish.api.Selector):
    """Create instance from the currently selected nodes"""
    def process_context(self, context):
        selection = cmds.ls(sl=1)
        if not selection:
            raise pyblish.api.SelectionError("Select something")

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"""Library versioning using the default Python syntax

Example:
    >>> is_compatible("pyblish<=1", (0, 9, 0))
    True
    >>> is_compatible("pyblish>=1.1, <2.1", (2, 0, 0))
    True

"""

mottosso

#python

import logging

# Pick up the "root" logger
log = logging.getLogger()

# In addition, Modo doesn't come with a handler; handlers
# are the objects actually performing any printing. So we'll
# add a vanilla handler that simply prints what the user asks