fix: support urllib3 2.6.0+ by replacing deprecated getheaders()

kubernetes/client/exceptions.py

@@ -107,7 +107,12 @@ def __init__(self, status=None, reason=None, http_resp=None):
             self.status = http_resp.status
             self.reason = http_resp.reason
             self.body = http_resp.data
-            self.headers = http_resp.getheaders()
+            # urllib3 2.0+ removed getheaders() in favor of the headers attribute.
+            try:
+                self.headers = http_resp.getheaders()
+            except AttributeError:
+                # Fallback for urllib3 >= 2.0
+                self.headers = getattr(http_resp, 'headers', None)
         else:
             self.status = status
             self.reason = reason

kubernetes/client/rest.py

@@ -40,7 +40,10 @@ def __init__(self, resp):
 
     def getheaders(self):
         """Returns a dictionary of the response headers."""
-        return self.urllib3_response.getheaders()
+        # urllib3 2.0+ removed getheaders() in favor of the headers attribute.
+        # Use getattr to support both old and new urllib3 versions.
+        return getattr(self.urllib3_response, 'getheaders',
+                       lambda: self.urllib3_response.headers)()
 
     def getheader(self, name, default=None):
         """Returns a given response header."""