code: def contains_peroxide(structure, relative_cutoff=1.1):
      
      ox_type = oxide_type(structure, relative_cutoff)
      if ox_type == "peroxide":
          return True
      else:
          return False
docs: Determines if a structure contains peroxide anions.
  
      Args:
          structure (Structure): Input structure.
          relative_cutoff: The peroxide bond distance is 1.49 Angstrom.
              Relative_cutoff * 1.49 stipulates the maximum distance two O
              atoms must be to each other to be considered a peroxide.
  
      Returns:
          Boolean indicating if structure contains a peroxide anion.