text: import sqlite3
  import hashlib
  
  def md5sum(t):
      return hashlib.md5(t).hexdigest()
  
  con = sqlite3.connect(":memory:")
  con.create_function("md5", 1, md5sum)
  cur = con.cursor()
  cur.execute("select md5(?)", (b"foo",))
  print(cur.fetchone()[0])
  
  con.close()
  