Lesson 13 solutions

students/swietczak_monika/lesson_13_objects_and_classes/exercise_1.py

@@ -0,0 +1,69 @@
+class Point:
+    def __init__(self, x, y):
+        self.x = x
+        self.y = y
+
+    def __str__(self):
+        return "x = {}, y = {}".format(self.x, self.y)
+
+
+class Circle:
+    def __init__(self, center, radius):
+        self.center = center
+        self.radius = radius
+
+
+class Rectangle:
+    def __init__(self, width, height, corner):
+        self.width = width
+        self.height = height
+        self.corner = corner
+
+
+def point_in_circle(point, circle):
+    if (point.x - circle.center.x) * (point.x - circle.center.x) + (point.y - circle.center.y) * (
+            point.y - circle.center.y) <= circle.radius * circle.radius:
+        return True
+    else:
+        return False
+
+
+def rectangle_points(rect):
+    left_down = rect.corner
+    left_up = Point(left_down.x, left_down.y + rect.height)
+    right_down = Point(left_down.x + rect.width, left_down.y)
+    right_up = Point(left_down.x + rect.width, left_down.y + rect.height)
+    result = [left_down, left_up, right_up, right_down]
+    return result
+
+
+def rect_in_circle(rectangle, circle):
+    points = rectangle_points(rectangle)
+    for point in points:
+        if not point_in_circle(point, circle):
+            return False
+        else:
+            return True
+
+
+def rect_circle_overlap(rectangle, circle):
+    points = rectangle_points(rectangle)
+    for point in points:
+        if point_in_circle(point, circle):
+            return True
+        else:
+            return False
+
+
+def main():
+    circle = Circle(Point(150, 100), 75)
+    point = Point(50, 100)
+    rectangle = Rectangle(20, 10, Point(120, 100))
+    print("Point:" + str(point))
+    print("Is point inside the circle? " + str(point_in_circle(point, circle)))
+    print("Is rectangle inside the circle? " + str(rect_in_circle(rectangle, circle)))
+    print("Is rectangle overlapping the circle? " + str(rect_circle_overlap(rectangle, circle)))
+
+
+if __name__ == '__main__':
+    main()

students/swietczak_monika/lesson_13_objects_and_classes/object_inspector.py

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+class Books:
+    def __init__(self, title, author, year):
+        self.title = title
+        self.author = author
+        self.year = year
+
+
+#    def __dir__(self):
+#       return [self.author, self.title, self.year]
+
+
+def object_inspector1(some_object):
+    attributes = dir(some_object)
+    return dict((key, getattr(some_object, key)) for key in attributes)
+
+
+def object_inspector2(some_object):
+    attributes = dir(some_object)
+    return dict((key, getattr(some_object, key)) for key in attributes
+                if isinstance(getattr(some_object, key), (int, float, str)))
+
+
+def main():
+    ksiazka = Books("Hasztag", "Remigiusz Mroz", 2018)
+    print(object_inspector1(ksiazka))
+    print(object_inspector2(ksiazka))
+
+
+if __name__ == '__main__':
+    main()

students/swietczak_monika/lesson_13_objects_and_classes/selective_shallow_compare.py

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+class Books:
+    def __init__(self, title, author, year):
+        self.title = title
+        self.author = author
+        self.year = year
+
+
+def shallow_compare(object1, object2, attributes):
+    for attribute in attributes:
+        if getattr(object1, attribute) != getattr(object2, attribute):
+            return False
+        else:
+            return True
+
+
+def main():
+    book1 = Books("Uwiklanie", "Zygmunt Miloszewski", 2007)
+    book2 = Books("Uwiklanie", "Zygmunt Miloszewski", 2007)
+    book3 = Books("Hasztag", "Remigiusz Mroz", 2018)
+    print("Book1: author: {}, title: {}, year: {}".format(book1.author, book1.title, book1.year))
+    print("Book2: author: {}, title: {}, year: {}".format(book2.author, book2.title, book2.year))
+    print("Book3: author: {}, title: {}, year: {}".format(book3.author, book3.title, book3.year))
+    attributes_list = ['title', 'author', 'year']
+    print("Are book 1 and book 2 equal? " + str(shallow_compare(book1, book2, attributes_list)))
+    print("Are book 1 and book 3 equal? " + str(shallow_compare(book1, book3, attributes_list)))
+
+
+if __name__ == "__main__":
+    main()