import ctypes as C

lib_path = './'
lib_name = 'ct.dylib'

print('loading dll... from ' + str(lib_path) + str(lib_name))
myclib = C.CDLL(lib_path + lib_name)

print('loaded')

genTest = myclib.genTest

genTest.argtypes = [C.c_char_p]
genTest.restype = C.c_int

print('test start')
res = genTest(C.c_char_p(str("abc")))
print ('test half done')
res = genTest(C.c_char_p(None))
print ('test successful')