Move list of known extensions to py34.url

py34/post.py

@@ -1,5 +1,5 @@
 from .scraper import scraper
-from .url import ImageURL, ThumbnailURL
+from .url import ImageURL, ThumbnailURL, IMAGE_FORMATS
 from io import BytesIO
 from PIL import Image
 from PIL.ImageFile import ImageFile
@@ -44,7 +44,7 @@ class Post:
     def get_image_data(self) -> bytes:
         if self._image_data is not None:
             return self._image_data
-        for ext in ["jpeg", "png", "gif", "mp4", "webm", "jpg"]:
+        for ext in IMAGE_FORMATS:
             try:
                 self._image_data = scraper.get(ImageURL(self.image_dir, self.image_id, ext), retry=False)
                 self._image_format = ext

py34/url.py

@@ -2,6 +2,9 @@ from urllib.parse import urlparse
 from os.path import splitext
 
 
+IMAGE_FORMATS = ["jpeg", "png", "gif", "mp4", "webm", "jpg"]
+
+
 class ImageURL:
     def __init__(self, image_dir: int, image_id: str, image_format: str):
         self.dir:    int = image_dir