code: def trim(self, edge_ic_cutoff=0.4):
          
          pwm = self.pwm[:]
          while len(pwm) > 0 and self.ic_pos(pwm[0]) < edge_ic_cutoff:
              pwm = pwm[1:]
              self.pwm = self.pwm[1:]
              self.pfm = self.pfm[1:]
          while len(pwm) > 0 and self.ic_pos(pwm[-1]) < edge_ic_cutoff:
              pwm = pwm[:-1]
              self.pwm = self.pwm[:-1]
              self.pfm = self.pfm[:-1]
          
          self.consensus = None 
          self.min_score = None
          self.max_score = None
          self.wiggled_pwm = None
          
          return self
docs: Trim positions with an information content lower than the threshold.
  
          The default threshold is set to 0.4. The Motif will be changed in-place.
  
          Parameters
          ----------
          edge_ic_cutoff : float, optional
              Information content threshold. All motif positions at the flanks 
              with an information content lower thab this will be removed.
  
          Returns
          -------
          m : Motif instance