import sqlite3
def _customFun(fstring, dept):
    result = 'Welcome ' + fstring + ' your dept is ' + dept
    return result


connection = sqlite3.connect(":memory:")
cursor = connection.cursor()
connection.create_function("ROHACK", 2, _customFun)
sql="CREATE TABLE student (First_Name, Department, Student_ID);"
cursor.execute(sql)
sql='INSERT INTO student values("Toto","LLM class", 1)'
cursor.execute(sql)

sqlQuery = "select ROHACK(First_Name,Department) from student where Student_ID = 1"
cursor.execute(sqlQuery)
print(*cursor.fetchone())

cursor.close()
connection.close()