def uprint(*args, print_ok=True, **kwargs):
    """Print option interface.

    This function is equal to ``print`` function but added ``print_ok``
    option. This allows you to control printing in a function.

    Parameters
    ----------
    *args: whatever ``print`` allows.
      It is same as ``print`` does.

    print_ok: Boolean (default: True)
      An option whether you want to print something out or not.

    arg_zip: zip (default: None)
      A ``zip`` instance.

    """
    if print_ok:
        print(*args, **kwargs)
