Update plotly/io/_kaleido.py

LiamConnors · emilykl · web-flow · commit 2f66bf107744 · 2025-05-06T15:51:48.000-04:00
Co-authored-by: Emily KL &lt;4672118+emilykl@users.noreply.github.com&gt;
diff --git a/plotly/io/_kaleido.py b/plotly/io/_kaleido.py
@@ -569,7 +569,8 @@ def write_images(
         Use a list to specify formats for each figure or dict in the list
         provided to the `fig` argument.
         Specify format as a `str` to apply the same format to all exported images.
-        If not specified, will default to `plotly.io.defaults.default_format`.
+        If not specified, and the corresponding `file` argument has a file extension, then `format` will default to the
+        file extension. Otherwise, will default to `plotly.io.defaults.default_format`.
 
     width: int, None, or list of (int or None)
         The width of the exported image in layout pixels. If the `scale`
