unbound local error local variable referenced before assignment python

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1. UnboundLocalError: Local Variable Referenced Before Assignment

   

2. Python UnboundLocalError

   

3. 【Python】UnboundLocalError: local variable 'x' referenced before assignment-CSDN博客

   

4. python

   

5. UnboundLocalError: local variable referenced before assignment

   

6. Error unboundlocalerror local variable referenced before assignment • Smartadm.ru