class StructureDistances:

    def __init__(self, pcdb):
        self.pcdb = pcdb


class FingerPrints:

    def __init__(self, pcdb):
        self.pcdb = pcdb

class StructureDistances:

    def __init__(self, pcdb):
        self.pcdb = pcdb


class FingerPrints:

    def __init__(self, pcdb):
        self.pcdb = pcdb
