@staticmethod
def is_comment_string(data_string):
    """ Checks if supplied string after stripping corresponds to comment and shall thus be ignored in data processing

        :param data_string: a string to check if it is a pure comment string
        :type data_string: ``str``
        :return: a flag indicating if supplied string is a pure comment string
        :rtype: ``Boolean``
        """
    return data_string.strip().startswith('#')
