Update watermark.py
Fix CI failure
@@ -18,7 +18,7 @@ def _open_image(url):
if 'exif' in img.info:
exif = piexif.load(img.info['exif'])
else:
- exif = {}
+ exif = None
return img, exif
except requests.exceptions.RequestException:
print('Error loading image data')
