def run(cmd, **kwargs):
    if isinstance(cmd, list):
        cmd = " ".join(pipes.quote(s) for s in cmd)
    kwargs.setdefault('echo', True)
    return invoke_run(cmd, **kwargs)
a.vstack(b) <==> a.stack(b, axis=0)
dataset/ETHPy150Open jupyterhub/jupyterhub/tools/tasks.py/run--crossover with--dataset/ETHPy150Open CountZer0/PipelineConstructionSet/python/maya/site-packages/pymel-1.0.5/extras/completion/py/pymel/util/arrays.py/Array.extend