def _zip_colors(self):
""" Create a list of alternating colors and zip them to the
burst sequence, keep as a list of burst lists.
"""
nsym = len(self.burst_sequence)
self._colors = map(self._positional_color, xrange(nsym))
zipped = zip(self.burst_sequence, self._colors)
self[:] = zipped
self.bursts = slices(zipped, self._burst_len)
def _create_burst_sequence(self):
""" Insert redundant symbols into the character sequence. """
make_burst = lambda b: self._new_redundance + b
bursts = map(make_burst, slices(self._sequence, self._burst_signi_len))
self.burst_sequence = list(chain(*bursts))
