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6 changes: 5 additions & 1 deletion Course3/Lab4/validations.py
Original file line number Diff line number Diff line change
Expand Up @@ -13,7 +13,7 @@ def validate_user(username, minlen):
if len(username) < minlen:
return False
# Usernames can only use letters, numbers, dots and underscores
if not re.match('^[a-z0-9._]*$', username):
if not re.match('^[a-z][a-z0-9._]*$', username):
return False
# Usernames can't begin with a number
if username[0].isnumeric():
Expand All @@ -22,3 +22,7 @@ def validate_user(username, minlen):



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