finish updating exercises

Author: despadam

13_object_oriented_programming_advanced.ipynb

@@ -554,7 +554,7 @@
     "\n",
     "from attrs import define\n",
     "\n",
-    "def solution_child_eye_color(mother_eye_color: str, father_eye_color: str) -> str:\n",
+    "def solution_child_eye_color(mother_eye_color: str, father_eye_color: str) -> list:\n",
     "    \"\"\"\n",
     "    Given the eye colors of the mother and father, defines the eye color of the child.\n",
     "    The possible eye colors are: brown or blue, with brown being the dominant one.\n",
@@ -1475,10 +1475,10 @@
     "\n",
     "<div class=\"alert alert-block alert-warning\">\n",
     "    <h4><b>Question</b></h4>\n",
-    "    Complete the solution function such that it creates the instances of the two computers mentioned in the list below.\n",
-    "    <strong>Pay attention to the type!</strong>\n",
+    "    Complete the solution function such that it creates the instances of the two computers mentioned below.\n",
+    "    They will be automatically passed as arguments to the solution function.\n",
     "    </br>\n",
-    "    This function should return a list that collects the <strong>string representations</strong> of the two computers.\n",
+    "    This function should return a list that collects the two instances you created.\n",
     "</div>"
    ]
   },
@@ -1491,27 +1491,41 @@
    "source": [
     "%%ipytest\n",
     "\n",
-    "computers = [\n",
-    "    {\n",
-    "        \"type\": \"PC\",\n",
-    "        \"name\": \"pc_1\",\n",
-    "        \"price\": 1500,\n",
-    "        \"quantity\": 1,\n",
-    "        \"expansion_slots\": 2\n",
-    "    },\n",
-    "    {\n",
-    "        \"type\": \"Laptop\",\n",
-    "        \"name\": \"laptop_1\",\n",
-    "        \"price\": 1200,\n",
-    "        \"quantity\": 4,\n",
-    "        \"battery_life\": 6\n",
-    "    }\n",
-    "]\n",
+    "pc = {\n",
+    "    \"name\": \"pc_1\",\n",
+    "    \"price\": 1500,\n",
+    "    \"quantity\": 1,\n",
+    "    \"expansion_slots\": 2\n",
+    "}\n",
+    "\n",
+    "laptop = {\n",
+    "    \"name\": \"laptop_1\",\n",
+    "    \"price\": 1200,\n",
+    "    \"quantity\": 4,\n",
+    "    \"battery_life\": 6\n",
+    "}\n",
+    "\n",
+    "def solution_store_inventory(pc: dict, laptop: dict) -> list:\n",
+    "    \"\"\"\n",
+    "    Creates instances of `PC` and `Laptop` classes based on the provided input dictionaries.\n",
+    "    The `Computer` class serves as the base class with attributes `name`, `price`, and `quantity`.\n",
+    "    The `PC` and `Laptop` classes inherit from `Computer` and extend it with additional attributes:\n",
+    "    - `PC` includes `expansion_slots`.\n",
+    "    - `Laptop` includes `battery_life`.\n",
     "\n",
+    "    Each class implements the `__init__` and `__str__` methods:\n",
+    "    - `Computer.__str__`: Returns a string representation of the `Computer` instance.\n",
+    "    - `PC.__str__`: Appends to the `Computer` string.\n",
+    "    - `Laptop.__str__`: Appends to the `Computer` string.\n",
     "\n",
-    "def solution_store_inventory(computers: list[dict]) -> list[str]:\n",
-    "    # Write your solution here\n",
-    "    pass"
+    "    Args:\n",
+    "        pc: A dictionary containing the attributes for the `PC` instance.\n",
+    "        laptop: A dictionary containing the attributes for the `Laptop` instance.\n",
+    "    Returns:\n",
+    "        A list containing the created the `PC` and `Laptop` instances.\n",
+    "    \"\"\"\n",
+    "\n",
+    "    return"
    ]
   },
   {
@@ -1529,15 +1543,18 @@
     "- **User** with attributes: username, playlists.\n",
     "\n",
     "Based on these, create the respective classes:\n",
-    "- `Song`: should contain attributes `title` (string), `artist` (string) and `album_title` (string)\n",
-    "- `Playlist`: should contain attributes `name` (string) and `songs` (a list of `Song` instances). It should also include a method for adding song a song to the playlist.\n",
-    "- `User`: should contain attributes `name` (string) and `playlists` (a dict where key is the name of the playlist and value is a `Playlist` instance). It should also include a method for creating a playlist and a method for adding a specific song to a specific playlist.\n",
+    "- `Song`: should contain attributes `title` (string), `artist` (string) and `album_title` (string).\n",
+    "- `Playlist`: should contain attributes `name` (string) and `songs` (a list of `Song` instances). It should also include a method for adding a song to the playlist.\n",
+    "- `User`: should contain attributes `username` (string) and `playlists` (a dict where key is the name of the playlist and value is a `Playlist` instance). It should also include a method for creating a playlist and a method for adding a specific song to a specific playlist.\n",
     "\n",
     "<div class=\"alert alert-block alert-warning\">\n",
     "    <h4><b>Question</b></h4>\n",
     "    Using <strong>composition</strong> in Python, create a music streaming service system that includes the classes mentioned above.\n",
     "    Create <strong>one user that has one playlist</strong>, containing the songs provided in the list below.\n",
-    "    Your solution function should <strong>return the <code>User</code></strong> instance.\n",
+    "    They will be automatically passed as arguments to the solution function.\n",
+    "    The user's username and the name of the playlist are also provided.\n",
+    "    </br>\n",
+    "    Your solution function should return the <code>User</code> instance.\n",
     "</div>"
    ]
   },
@@ -1568,9 +1585,29 @@
     "    },\n",
     "]\n",
     "\n",
-    "def solution_music_streaming_service(song_info: list[dict]):\n",
-    "    # Write your solution here\n",
-    "    pass"
+    "def solution_music_streaming_service(song_info: list[dict], username: str, playlist_name: str):\n",
+    "    \"\"\"\n",
+    "    Creates a music streaming service system using composition, including classes for `Song`, `Playlist`, and `User`:\n",
+    "    - `Song` represents a song with:\n",
+    "        - title\n",
+    "        - artist\n",
+    "        - album_title\n",
+    "    - `Playlist` represents a playlist with:\n",
+    "        - name\n",
+    "        - songs\n",
+    "        - Includes a method to add a song to the playlist.\n",
+    "    - `User` represents a user with:\n",
+    "        - username\n",
+    "        - playlists\n",
+    "        - Includes methods to create a playlist and add a song to a specific playlist.\n",
+    "\n",
+    "    Args:\n",
+    "        song_info: A list of dictionaries, where each dictionary contains the details of a song.\n",
+    "    Returns:\n",
+    "        An instance of the `User` class with one playlist containing the provided songs.\n",
+    "    \"\"\"\n",
+    "\n",
+    "    return"
    ]
   },
   {
@@ -1796,8 +1833,29 @@
     "%%ipytest\n",
     "\n",
     "def solution_n_body(universe_start: str) -> int:\n",
-    "    # Write your solution here\n",
-    "    pass"
+    "    \"\"\"\n",
+    "    Simulates the motion of moons in a 3-dimensional space over a specified number of time steps\n",
+    "    and calculates the average total energy of the system.\n",
+    "\n",
+    "    The simulation involves:\n",
+    "    1. Updating the velocity of each moon based on the gravitational interaction with other moons.\n",
+    "    2. Updating the position of each moon by applying its velocity.\n",
+    "    3. Calculating the total energy of the system after the simulation.\n",
+    "\n",
+    "    Total energy for a single moon is calculated as:\n",
+    "    - Potential energy: The sum of the absolute values of its positional coordinates.\n",
+    "    - Kinetic energy: The sum of the absolute values of its velocity components.\n",
+    "    - Total energy: Potential energy multiplied by kinetic energy.\n",
+    "\n",
+    "    Args:\n",
+    "        universe_start (str): A string representing the initial positions of the moons in the format:\n",
+    "            \"MoonName: x=<value>, y=<value>, z=<value>\"\n",
+    "\n",
+    "    Returns:\n",
+    "        int: The average total energy of the system after simulating the universe for 1000 time steps.\n",
+    "    \"\"\"\n",
+    "\n",
+    "    return"
    ]
   }
  ],