add ex3

ex3.py

@@ -0,0 +1,26 @@
+import os.path
+from glob import glob
+
+
+class ImageStandardizer:
+    def __init__(self, input_dir: str) -> None:
+        super().__init__()
+
+        # todo scan for .jpeg files
+
+        # scan input dir for files
+        files = glob(input_dir + '/**/*.jpg', recursive=True)
+        if len(files) == 0:
+            raise ValueError
+
+        # convert them into absolute paths
+        files = [os.path.abspath(x) for x in files]
+
+        # sort filenames
+        files.sort()
+
+    def analyze_images(self) -> None:
+        pass
+
+    def get_standardized_images(self) -> None:
+        pass