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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def iswhsp(string):
 """ Return a boolean value indicating whether a string contains only white space characters. http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/iswhsp_c.html :param string: String to be tested. :type string: str :return: the boolean value True if the string is empty or contains only white space characters; otherwise it returns the value False. :rtype: bool """

    string = stypes.stringToCharP(string)
    return bool(libspice.iswhsp_c(string))