def read_file_comment(file_path):
    """Reads info comment in a coin CSV file.

    Args:
        file_path (str): given coin file path

    Raises:
        ValueError: occurs if no comment exist at the top
                    of coin file

    Returns:
        comment (str): info comment in the coin file 
    """
    with open(file_path, 'r') as f:
        line = f.readline()
        if not line.startswith('#'):
            file_name = file_path.split('\\')[2]
            raise ValueError(
                f"{file_name} does not include coin info comment!\n\n")
        return line.replace('#', '')