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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 ekntab():
 """ Return the number of loaded EK tables. http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/ekntab_c.html :return: The number of loaded EK tables. :rtype: int """

    n = ctypes.c_int(0)
    libspice.ekntab_c(ctypes.byref(n))
    return n.value