Add Emails class for email validation and storage

Week05/emails_efe_samil_sarigul.py

@@ -0,0 +1,21 @@
+class Emails(list):
+    def __init__(self, emails):
+        self.data = self.validate(emails)
+        super().__init__(self.data)
+
+    def validate(self, emails):
+        result = []
+        for email in emails:
+            if type(email) is not str:
+                raise ValueError("Emails must be strings.")
+            if email.count("@") != 1 or "." not in email.split("@")[1]:
+                raise ValueError("Invalid email address.")
+            if email not in result:
+                result.append(email)
+        return result
+
+    def __repr__(self):
+        return f"Emails({self.data})"
+
+    def __str__(self):
+        return ", ".join(self.data)