def decompile(self, data, ttFont):
    if ((data is not None) and (ttFont is not None)):
        self.decompileHeader(data, ttFont)
    else:
        assert ((data is None) and (ttFont is None)), 'Need both data and ttFont arguments'
def decompile(self, data, ttFont):
    if ((data is not None) and (ttFont is not None)):
        self.decompileHeader(data, ttFont)
    else:
        assert ((data is None) and (ttFont is None)), 'Need both data and ttFont arguments'