docs: def _print_bits(self,norm=2.3, height=8.0):
          """
          m._print_bits(,norm=2.3, height=8.0) -- Print a text-rendering of the Motif Logo
  
          norm   -- maximum number of bits to show
          height -- number of lines of text to use to render logo
          """
          bits   = []
          tots   = []
          str    = []
          for i in range(self.width):
              D = {}
              tot = 0
              for letter in ['A', 'C', 'T', 'G']:
                  if self.logP:
                      Pij = pow(2.0, self.logP[i][letter])
                  else:
                      Pij = pow(2.0, self.ll[i][letter]) * self.background[letter]
                  if Pij > 0.01:
                      '''Old'''
                      D[letter] = Pij * self.ll[i][letter]
                      #'''new'''
                      #Q = self.background[letter]
                      #D[letter] = ( Pij * math.log(Pij) - Pij * math.log(Q) ) / math.log(2.0)
                      '''for both old and new'''
                      tot = tot + D[letter]
              bits.append(D)
              tots.append(tot)
          for i in range(self.width):
              s = []
              _l = bits[i].keys()
              _l.sort(lambda x,y,D=bits[i]: cmp(D[y],D[x]))
              for key in _l:
                  for j in range(int(bits[i][key] / norm * height)):
                      s.append(key)
              str.append(''.join(s))
          fmt = '%%%ds'%height
          print '#  %s'%('-'*self.width)
          for h in range(int(height)):
              sys.stdout.write("#  ")
              for i in range(self.width):
                  sys.stdout.write((fmt%str[i])[h])
              if h == 0:
                  sys.stdout.write(' -- %4.2f bits\n'%norm)
              elif h == height-1:
                  sys.stdout.write(' -- %4.2f bits\n'%(norm/height))
              else:
                  sys.stdout.write('\n')
          print '#  %s'%('-'*self.width)
          print '#  %s'%self.oneletter