By methodically checking your string literals, verifying your delimiters, and embracing parameterized queries, you will never be defeated by error 420 again.
query = "SELECT * FROM users WHERE name = %s" cursor.execute(query, (user_input,)) 420 query unterminated
Many databases do not allow literal newlines inside single-quoted strings unless you use specific escape sequences. That newline character acts as a hidden terminator, causing a 420 error. By methodically checking your string literals