def length(self, *args):
        return sqrt(self.sqlength(*args))
a.length(axis0, axis1, ...) <==> length(a[, axis=(axis0, axis1, ...)])
dataset/ETHPy150Open CountZer0/PipelineConstructionSet/python/maya/site-packages/pymel-1.0.3/pymel/util/arrays.py/Array.length