fix: images sending as 0 bytes in paginator if sent as io.BytesIO

CHANGELOG.md

@@ -31,6 +31,9 @@ These changes are available on the `master` branch, but have not yet been releas
 
 ### Fixed
 
+- Fixed a bug in `Page.update_files` where `io.BytesIO` files didn't send properly more
+  than once.
+
 - Fixed a bug in `Page.update_files` where file objects stored in memory were causing an
   `AttributeError`. ([#1869](https://github.com/Pycord-Development/pycord/pull/1869))
 

discord/ext/pages/pagination.py

@@ -174,14 +174,21 @@ def update_files(self) -> list[discord.File] | None:
         """
         for file in self._files:
             if not isinstance(file.fp, BufferedReader):
-                continue
-            with open(file.fp.name, "rb") as fp:  # type: ignore
+                file.fp.seek(0)
                 self._files[self._files.index(file)] = discord.File(
-                    fp,  # type: ignore
+                    file.fp,  # type: ignore
                     filename=file.filename,
                     description=file.description,
                     spoiler=file.spoiler,
                 )
+            else:
+                with open(file.fp.name, "rb") as fp:  # type: ignore
+                    self._files[self._files.index(file)] = discord.File(
+                        fp,  # type: ignore
+                        filename=file.filename,
+                        description=file.description,
+                        spoiler=file.spoiler,
+                    )
         return self._files
 
     @property