def open_unknown_proxy(self, proxy, fullurl, data=None):
        type, url = splittype(fullurl)
        raise IOError, ('url error', 'invalid proxy for %s' % type, proxy)

    # External interface
construct array with independent columns
dataset/ETHPy150Open ofermend/medicare-demo/socialite/jython/Lib/urllib.py/URLopener.open_unknown_proxy--crossover with--dataset/ETHPy150Open statsmodels/statsmodels/statsmodels/tools/catadd.py/add_indep