add method __init__ to all classes and redefinition skills

app/main.py

@@ -1,32 +1,39 @@
 
 class SoftwareEngineer:
-    skills = []
+    # skills = []
 
     def __init__(self, name: str) -> None:
         self.name = name
+        self.skills = []
 
     def learn_skill(self, skill: str) -> None:
         self.skills.append(skill)
 
 
 class FrontendDeveloper(SoftwareEngineer):
-    skills = ["JavaScript", "HTML", "CSS"]
+    def __init__(self, name: str) -> None:
+        super().__init__(name)
+        self.skills = ["JavaScript", "HTML", "CSS"]
 
     def create_awesome_web_page(self) -> str:
         print(f"{self.name} is creating a webpage...")
         return "<h1>Hello world</h1>"
 
 
 class BackendDeveloper(SoftwareEngineer):
-    skills = ["Python", "SQL", "Django"]
+    def __init__(self, name: str) -> None:
+        super().__init__(name)
+        self.skills = ["Python", "SQL", "Django"]
 
     def create_powerful_api(self) -> str:
         print(f"{self.name} is creating an API...")
         return "http://127.0.0.1:8000"
 
 
 class AndroidDeveloper(SoftwareEngineer):
-    skills = ["Java", "Android studio"]
+    def __init__(self, name: str) -> None:
+        super().__init__(name)
+        self.skills = ["Java", "Android studio"]
 
     def create_smooth_mobile_app(self) -> str:
         print(f"{self.name} is creating a mobile app...")
@@ -39,14 +46,16 @@ class FullStackDeveloper(
     FrontendDeveloper,
     SoftwareEngineer
 ):
-    skills = [
-        "Python",
-        "SQL",
-        "Django",
-        "JavaScript",
-        "HTML",
-        "CSS",
-    ]
+    def __init__(self, name: str) -> None:
+        super().__init__(name)
+        self.skills = [
+            "Python",
+            "SQL",
+            "Django",
+            "JavaScript",
+            "HTML",
+            "CSS",
+        ]
 
     def create_web_application(self) -> None:
         print(f"{self.name} started creating a web application...")