Check file path for animation and raise if it does not exist

oscargus · oscargus · commit 64196bad17df · 2023-02-17T07:01:31.000+01:00
diff --git a/lib/matplotlib/animation.py b/lib/matplotlib/animation.py
@@ -193,6 +193,9 @@ def setup(self, fig, outfile, dpi=None):
             The DPI (or resolution) for the file.  This controls the size
             in pixels of the resulting movie file.
         """
+        outdirectory = Path(outfile).parent
+        if not outdirectory.exists():
+            raise ValueError(f"{outdirectory} does not exist!")
         self.outfile = outfile
         self.fig = fig
         if dpi is None:
@@ -405,11 +408,7 @@ def setup(self, fig, outfile, dpi=None, frame_prefix=None):
             deleted by `finish`; if not *None*, no temporary files are
             deleted.
         """
-        self.fig = fig
-        self.outfile = outfile
-        if dpi is None:
-            dpi = self.fig.dpi
-        self.dpi = dpi
+        super().setup(fig, outfile, dpi=dpi)
         self._adjust_frame_size()
 
         if frame_prefix is None:
