unboundlocalerror local variable 'w' referenced before assignment

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1. "Fixing UnboundLocalError: Local Variable Referenced Before Assignment"

   

2. UnboundLocalError: Local Variable Referenced Before Assignment

   

3. UnboundLocalError: local variable referenced before assignment

   

4. Python :Python 3: UnboundLocalError: local variable referenced before

   

5. Python 3: UnboundLocalError: local variable referenced before

   

6. [Solved] UnboundLocalError: local variable 'x' referenced