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Fix icon when passing Marker to GeoJson #2086

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@Conengmo Conengmo commented Jan 24, 2025

Fixes #2084, which is an issue introduced by #2068.

We shouldn't have removed self.icon in Marker. It's not directly visible where it is used, so I added a comment to prevent this from happening again.

hansthen

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folium/map.py Outdated
@@ -403,8 +403,11 @@ def __init__(
self.options = remove_empty(
draggable=draggable or None, autoPan=draggable or None, **kwargs
)
# this attribute is not used by Marker, but by GeoJson
self.icon: Optional[Icon] = None
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This still fails if people use the add_child method to add an icon. I am okay with that, but I think we should be aware of it.

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Also the render method (roughly lines 430-436) was originally rewritten to allow people to use add_child. If we go back to icon as a member variable, we should make it consistent throughout the class.

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Passing folium.Icon to folium.Marker seems to be broken on main
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