def METHOD_NAME(runas=None):
    """
    List the installable versions of python.
    CLI Example:
    .. code-block:: bash
        salt '*' pyenv.list
    """
    ret = []
    output = _pyenv_exec("install", "--list", runas=runas)
    if output:
        for line in output.splitlines():
            if line == "Available versions:":
                continue
            ret.append(line.strip())
    return ret