def from_form(self, formnode):
        for name, value in formnode.fetch_form_values():
            self.__setitem__(name, value)
Extract and validate filename from a Content-Disposition header.
dataset/ETHPy150Open kdart/pycopia/WWW/pycopia/WWW/client.py/HTTPForm.from_form--crossover with--dataset/ETHPy150Open RoseOu/flasky/venv/lib/python2.7/site-packages/httpie/downloads.py/filename_from_content_disposition