class Corpus:
    def __init__(self, id_corpus):
    	self.id_corpus = id_corpus
    	self.size
    	self.exception
    	self.settings
    	self.handle_index
        # self.struct = struct

class Corpus_Database(Corpus):
    def __init__(self):
    	pass

class Corpus_Filesystem(Corpus):
    def __init__(self):
    	self.size_in_bytes
    	self.state_loaded

