Python 使用Enigma Catalyst检索Bittrex交换的分钟频率数据时出错

我正在尝试使用库从Bittrex exchange中摄取货币对的分钟数据

ltc_btc

：

从CLI：

$ catalyst ingest-exchange -x bittrex -f minute -i ltc_btc

得到：

问题似乎来自于正在交易的特定资产，该资产的

end\u minute

设置为“N/A”，导致

end

和

last\u entry

为空

---

错误是由于缺少分钟烛台数据，还是Bittrex没有通过其api提供分钟数据（但如果是梯形图，Catalyst可以从检索到的所有数据构造分钟烛台）

Bittrex还没有分钟捆绑包。

我的首选方法是在poloniex中运行回溯测试，然后在bittrex中执行实时交易。不过，并非所有的配对都可用

  File "/Users/cyrusghazanfar/Desktop/python-projects/catalyst/catalyst/__main__.py", line 545, in ingest_exchange
    csv=csv
  File "/Users/cyrusghazanfar/Desktop/python-projects/catalyst/catalyst/exchange/exchange_bundle.py", line 820, in ingest
    show_report=show_report
  File "/Users/cyrusghazanfar/Desktop/python-projects/catalyst/catalyst/exchange/exchange_bundle.py", line 596, in ingest_assets
    end_dt=end_dt
  File "/Users/cyrusghazanfar/Desktop/python-projects/catalyst/catalyst/exchange/exchange_bundle.py", line 509, in prepare_chunks
    start_dt, end_dt, [asset], data_frequency
  File "/Users/cyrusghazanfar/Desktop/python-projects/catalyst/catalyst/exchange/exchange_bundle.py", line 469, in get_adj_dates
    if data_frequency == 'minute' else last_entry
AttributeError: 'NoneType' object has no attribute 'replace'