local variable 'train_data' referenced before assignment

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1. How to fix UnboundLocalError: local variable 'x' referenced before assignment in Python

   

2. [SOLVED] Local Variable Referenced Before Assignment

   

3. [SOLVED] Local Variable Referenced Before Assignment

   

4. Local variable 'sql' referenced before assignment

   

5. Local variable 'loss' referenced before assignment

   

6. Local Variable Referenced Before Assignment in Python