Commits on Sep 26, 2023

1. Fix crash in refactoring checker from unaryop with variable …

   Fixes:
   ```
     File "python3.10/site-packages/pylint/utils/ast_walker.py", line 91, in walk
       callback(astroid)
     File "python3.10/site-packages/pylint/checkers/refactoring/refactoring_checker.py", line 700, in visit_for
       self._check_unnecessary_list_index_lookup(node)
     File "python3.10/site-packages/pylint/checkers/refactoring/refactoring_checker.py", line 2227, in _check_unnecessary_list_index_lookup
       has_start_arg, confidence = self._enumerate_with_start(node)
     File "python3.10/site-packages/pylint/checkers/refactoring/refactoring_checker.py", line 2352, in _enumerate_with_start
       start_val, confidence = self._get_start_value(keyword.value)
     File "python3.10/site-packages/pylint/checkers/refactoring/refactoring_checker.py", line 2369, in _get_start_value
       return node.operand.value, HIGH
   AttributeError: 'Name' object has no attribute 'value'
   ```
   
   Crash is reproducible if you have something like this:
   
   ```python
   x=5
   for _ in enumerate(range, start=-x):
       ...
   ```
   
   As a workaround, remove the unary op before `for` loop (i.e. change the
   variable used).
   
   Closes pylint-dev#9074

   

   Hnasar committed Sep 26, 2023
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