def backup_sqlite(filename):
    con = sqlite3.connect(DATABASE)
    with open(filename, 'w') as f:
        for line in con.iterdump():
            f.write("{0}\n".format(line))
Returns a list of all the vertices in the graph.
dataset/ETHPy150Open tsileo/bakthat/bakthat/models.py/backup_sqlite--crossover with--dataset/ETHPy150Open espeed/bulbs/bulbs/base/graph.py/Graph.V