Closes: google#36055

Updated validations.py python script

Course3/Lab4/validations.py

@@ -16,9 +16,12 @@ def validate_user(username, minlen):
     if not re.match('^[a-z0-9._]*$', username):
         return False
     # Usernames can't begin with a number
-    if username[0].isnumeric():
+    if not re.match('[a-zA-Z]', username[0]):
         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, should be False