def get_dataframes(ctxs_and_nodes, start=None, end=None):
    assert _frame is not None, "MDF viewer not open"
    return _frame.GetDataFrames(ctxs_and_nodes, start, end)

# aliases for use in ipython
Get a Decimal representing the BTC value of the given Balance.
dataset/ETHPy150Open manahl/mdf/mdf/viewer/__init__.py/get_dataframes--crossover with--dataset/ETHPy150Open robmcl4/Coinex/market_cap.py/get_amt_in_btc