QuantHelper

Troubleshooting

Quick fixes for common JoinQuant errors:

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🔹 SyntaxError

• Cause: Missing comma / wrong brackets
• Fix: Check commas in query() and indentation

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🔹 AttributeError

• Cause: Wrong field name (e.g. valuation,pe_ratio)
• Fix: Use valuation.pe_ratio and confirm fields exist

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🔹 Date Error

• Cause: Using data='2019-09-01'
• Fix: Correct param is date='YYYY-MM-DD'

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📌 Tip: Always print(df.head()) to check returned columns