Closes: #1

Course3/Lab4/validations.py

@@ -8,7 +8,7 @@ def validate_user(username, minlen):
         raise TypeError("username must be a string")
     if minlen < 1:
         raise ValueError("minlen must be at least 1")
-    
+
     # Usernames can't be shorter than minlen
     if len(username) < minlen:
         return False
@@ -18,7 +18,14 @@ def validate_user(username, minlen):
     # Usernames can't begin with a number
     if username[0].isnumeric():
         return False
+    # Usernames must start with a letter
+    if not username[0].isalpha():
+        return False
     return True
 
 
 
+print(validate_user("blue.kale", 3)) # True
+print(validate_user(".blue.kale", 3)) # Currently True, should be False
+print(validate_user("red_quinoa", 4)) # True
+print(validate_user("_red_quinoa", 4)) # Currently True, shoud be False