Create Emails class for email validation and storage

Week05/emails_melda_gungor.py

@@ -0,0 +1,38 @@
+class Emails(list):
+    def __init__(self, emails=None):
+        if emails is None:
+            emails = []
+
+        valid_unique_emails = []
+        for email in emails:
+            self.validate(email)
+            if email not in valid_unique_emails:
+                valid_unique_emails.append(email)
+
+
+        super().__init__(valid_unique_emails)
+        self.data = self
+
+    @staticmethod
+    def validate(email):
+        if not isinstance(email, str):
+            raise ValueError(f"email must be a string, got {type(email)}")
+        if email.count("@") != 1:
+            raise ValueError(f"invalid email address: {email}")
+
+        user, domain = email.split("@")
+
+        if not user or not domain:
+            raise ValueError(f"invalid email address: {email}")
+
+        if "." not in domain or domain.startswith(".") or domain.endswith("."):
+            raise ValueError(f"invalid email address: {email}")
+
+        return True 
+
+    def __repr__(self):
+        return f"Emails({list(self)})"
+
+    def __str__(self):
+        return super().__str__()
+