assignment-a3: adds code

mmp/a3/annotation.py

@@ -1,3 +1,5 @@
+import glob
+import os
 from typing import List
 import numpy as np
 
@@ -6,22 +8,31 @@ class AnnotationRect:
     """Exercise 3.1"""
 
     def __init__(self, x1, y1, x2, y2):
-        raise NotImplementedError()
+        self.x1 = x1
+        self.x2 = x2
+        self.y1 = y1
+        self.y2 = y2
 
     def area(self):
-        raise NotImplementedError()
+        return (self.x2 - self.x1) * (self.y2 - self.y1)
 
     def __array__(self) -> np.ndarray:
-        raise NotImplementedError()
+        return np.array([self.x1, self.y1, self.x2, self.y2])
 
     @staticmethod
     def fromarray(arr: np.ndarray):
-        raise NotImplementedError()
+        return AnnotationRect(arr[0], arr[1], arr[2], arr[3])
 
 
 def read_groundtruth_file(path: str) -> List[AnnotationRect]:
     """Exercise 3.1b"""
-    raise NotImplementedError()
+    annotationRects = []
+    with open(path, 'r') as file:
+        for line in file:
+            if line.strip():
+                values = line.strip().split()
+                annotationRects.append(AnnotationRect(float(values[0]), float(
+                    values[1]), float(values[2]), float(values[3])))
+    return annotationRects
 
 
-# put your solution for exercise 3.1c wherever you deem it right