Bug fix: ClientProvider not set connection to calendar and instrument provider when initializing. #500
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The isinstance checking for client calendar and client instrument provider are not correct, here is a little patch to fix it.
And fix the dump script to drop duplicates.
Description
When use qlib online mode, with following configuration (from qlib-server document), will cause exception "qlib/data/data.py", line 817, in list_instruments. AttributeError: 'NoneType' object has no attribute 'send_request'".
Motivation and Context
How Has This Been Tested?
pytest qlib/tests/test_all_pipeline.py
under upper directory ofqlib
.Screenshots of Test Results (if appropriate):
Types of changes