def sections(self):
        # self._sections will never have [DEFAULT] in it
        return self._sections.keys()
get sequence type (aa,na,codons).
dataset/ETHPy150Open azoft-dev-team/imagrium/env/Lib/ConfigParser.py/RawConfigParser.sections--crossover with--dataset/ETHPy150Open CGATOxford/cgat/CGAT/Masker.py/Masker.getAlphabet