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Ensure key is a Constant. #65

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3 changes: 2 additions & 1 deletion logging_format/visitor.py
Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@
from ast import (
Add,
Call,
Constant,
keyword,
iter_child_nodes,
Mod,
Expand Down Expand Up @@ -147,7 +148,7 @@ def visit_Dict(self, node):
if self.should_check_extra_field_clash(node):
for key in node.keys:
# key can be None if the dict uses double star syntax
if key is not None and key.s in RESERVED_ATTRS:
if key is not None and isinstance(key, Constant) and key.s in RESERVED_ATTRS:
self.violations.append((self.current_logging_call, EXTRA_ATTR_CLASH_VIOLATION.format(key.s)))

if self.should_check_extra_exception(node):
Expand Down