性能告警cannot map directly to c-types
由zjmafg创建，最终由small_q 被浏览 6 用户
请问：在回测时报性能告警，是什么原因，如何避免？
/usr/local/python3/lib/python3.8/site-packages/pandas/core/generic.py:2605: PerformanceWarning:
your performance may suffer as PyTables will pickle object types that it cannot
map directly to c-types [inferred_type->mixed,key->block3_values] [items->Index(['instrument', 'name', 'suspend_type', 'suspend_reason', 'suspended'], dtype='object')]
pytables.to_hdf(
\