unboundlocalerror local variable 'root' 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. UnboundLocalError: local variable 'timeInSeconds' referenced before assignment

   

4. UnboundLocalError: local variable 'timeInSeconds' referenced before assignment

   

5. UndboundLocalError: local variable referenced before assignment

   

6. Local Variable Referenced Before Assignment Solved Error In Python