def popen4(cmd, bufsize=-1, mode='t'):
        w, r = os.popen4(cmd, mode, bufsize)
        return r, w
Parse headers.
dataset/ETHPy150Open azoft-dev-team/imagrium/env/Lib/popen2.py/popen4--crossover with--dataset/ETHPy150Open lorien/grab/grab/document.py/Document.parse