#/usr/bin/python
def hash_file(path):

class fs:
    def __init__(self,top,db_path=None,hash_threshold=1024**2):
        self.top=top
        self.hash_threshold=hash_threshold
        if db_path is not None:
            self.db_path=db_path
        else:
            self.db_path = 'fs.db'

    def from_db(self,top,db_path,_id=0):
        pass

    def write_to_db(self):
        pass

    def morph(self,other):
        pass

    def backup(self,other):
        pass