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.

def contains_peroxide(structure, relative_cutoff=1.1):
    """
    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.
    """
    ox_type = oxide_type(structure, relative_cutoff)
    if ox_type == "peroxide":
        return True
    else:
        return False