def validate_url_container(container):
    if isinstance(container, str):
        url = container
        return validate_url(url)
    elif isinstance(container, dict):
        container = iter(container.values())
    
    for element in container:
        validate_url_container(element)
Gets the Field object at the specified index, which may be either
dataset/ETHPy150Open ipython/ipython-py3k/IPython/parallel/util.py/validate_url_container--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.2/django/contrib/gis/gdal/feature.py/Feature.__getitem__