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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 expool(name):
 """ Confirm the existence of a kernel variable in the kernel pool. http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/expool_c.html :param name: Name of the variable whose value is to be returned. :type name: str :return: True when the variable is in the pool. :rtype: bool """

    name = stypes.stringToCharP(name)
    found = ctypes.c_int()
    libspice.expool_c(name, ctypes.byref(found))
    return bool(found.value)