adding solution to task 'online-course

app/main.py

@@ -1,3 +1,24 @@
+import math
+from typing import Any
+
+
 class OnlineCourse:
-    # write your code here
-    pass
+    def __init__(self, name: str, description: str, weeks: int) -> None:
+        self.name = name
+        self.description = description
+        self.weeks = weeks
+
+    @staticmethod
+    def days_to_weeks(days: int) -> int:
+        return math.ceil(days / 7)
+
+    @classmethod
+    def from_dict(cls, course_dict: dict) -> Any:
+        tmp_weeks = {"weeks": cls.days_to_weeks(course_dict["days"])}
+        del course_dict["days"]
+        course_dict.update(tmp_weeks)
+        return cls(
+            course_dict["name"],
+            course_dict["description"],
+            course_dict["weeks"]
+        )