Additional check for image()

flimsyhat · flimsyhat · commit 01b2fb58d698 · 2025-02-17T09:18:30.000+01:00
Throw an error if someone calls image() without any arguments, rather than crashing later when trying to access the non-existent _nsImage
diff --git a/plotdevice/gfx/image.py b/plotdevice/gfx/image.py
@@ -63,6 +63,10 @@ def __init__(self, *args, **kwargs):
         elif args and args[0] is None:
             args.pop(0) # make image(None, 10,20, image=...) work properly for compat
 
+        # Validate that we have either a source or data
+        if not (src or data):
+            raise DeviceError("Image requires either a source (path/url/Image) or image data")
+
         # get an NSImage reference (once way or another)
         if data:
             self._nsImage = self._lazyload(data=data)
