def __is_label(line):
    """
    Return if the line is a label or not

    Args:
        line (str): line to test

    Returns:
        bool: True if the line is a label
    """
    if line == '':
        return False
    elif 'xxx' in line:
        return False
    elif "The x's" in line:
        return False
    else:
        return True
    """
    Read an ASL binary file

    Args:

    `file`: the file to be read
    `size_header`: binary size of the header
    `start_labels`: first row with the labels
    `endian`: big (">") or little ("<")
    `dtype`: type of the data ("f" for float, ...)

    Return:
    -------

    `labels`: list of all the labels
    `array`: 2D matrix containing the data
    """
