fix: rendering of SVGs in jupyter notebooks

Author: has2k1

doc/changelog.qmd

@@ -23,6 +23,8 @@ title: Changelog
 
 - Fixed [](:class:`~plotnine.geom_smooth`) / [](:class:`~plotnine.stat_smooth`) when using a linear model via "lm" with weights for the model to do a weighted regression. This bug did not affect the formula API of the linear model. ({{< issue 1005 >}})
 
+- Fixed rendering of SVGs in jupyter notebooks.
+
 ## v0.15.2
 (2025-12-12)
 

plotnine/_utils/ipython.py

@@ -55,12 +55,15 @@ def get_mimebundle(
     }
     mimetype = lookup[format]
 
+    image: bytes | str = b
     metadata: dict[str, DisplayMetadata] = {}
     w, h = figure_size_px
     if format in ("png", "jpeg"):
         metadata = {mimetype: {"width": w, "height": h}}
     elif format == "retina":
         # `retina=True` in IPython.display.Image just halves width/height
         metadata = {mimetype: {"width": w // 2, "height": h // 2}}
+    elif format == "svg":
+        image = b.decode()
 
-    return {mimetype: b}, metadata
+    return {mimetype: image}, metadata

plotnine/typing.py

@@ -157,4 +157,6 @@ class DisplayMetadata(TypedDict):
     height: NotRequired[int]
 
 
-MimeBundle: TypeAlias = tuple[dict[str, bytes], dict[str, DisplayMetadata]]
+MimeBundle: TypeAlias = tuple[
+    dict[str, bytes | str], dict[str, DisplayMetadata]
+]