PeterDrakeNichols

import maya.cmds as mc
from functools import partial

def createWindow():
    if len(mc.ls(sl=1)) is 2:
        selSource = mc.ls(sl=1)[0]
        selTarget = mc.ls(sl=1)[1]
    else:
        selSource = selTarget = 'nothing selected'
    windowName = 'Pose Driver Widget'

PeterDrakeNichols

import maya.cmds as mc
def makeSplineStretchy(chainJoints,chainCurve,stretchAxis = 'X'):
    chainCurveShape = mc.listRelatives(chainCurve, shapes=1)[0]
    lengthNode = mc.createNode('curveInfo', n = chainCurve + '_length')
    mc.connectAttr(chainCurveShape + '.worldSpace[0]', lengthNode + '.inputCurve')
    restLength = mc.getAttr(lengthNode + '.arcLength')
    multiNode = mc.createNode('multiplyDivide', n= chainCurve + '_multiDiv' )
    mc.connectAttr(lengthNode + '.arcLength', multiNode + '.input1X')
    mc.setAttr(multiNode + '.input2X', restLength)
    mc.setAttr(multiNode + '.operation', 2)

PeterDrakeNichols

"""
curves @ utils
parses paths to curve.mb's from assets/crvSrc folder

EXAMPLES:

    #imports the first curve in crvSrc folder
    mc.file(rigLib.utils.curves.curvesList[0], i=1)

    #prints a list of curves in crvSrc folder