问题描述：
IndexError
Traceback (most recent call last)
<ipython-input-35-c6c0e9212ea5> in <module>()
2 index = 1
3 plt.imshow(test_set_x[:,index].reshape((num_px, num_px, 3)))
----> 4 print ("y = " + str(test_set_y[0,index]) + ", you predicted that it is a \"" + classes[d["Y_prediction_test"][0,index]].decode("utf-8") + "\" picture.")
IndexError: only integers, slices (`:`), ellipsis (`...`), numpy.newaxis (`None`) and integer or boolean arrays are valid indices
错误之处在索引处使用了浮点数，
解决办法：
print ("y = " + str(test_set_y[0,index]) + ", you predicted that it is a \"" + classes[int(d["Y_prediction_test"][0,index])].decode("utf-8") + "\" picture.")
通过网上这篇：https://blog.csdn.net/zuyuhuo6777/article/details/80377771解决了这个问题，十分感谢。
最后的呈现：