载入MNIST数据集出错

[liyu106]

代码：
from tensorflow.examples.tutorials.mnist import input_data
mnist=input_data.read_data_sets("/path/to/MNIST_data/",one_hot=True)
print('Training data size:',mnist.train.num_example)
错误：
Traceback (most recent call last):
File "/Users/liyu/Desktop/python_work/MNIST.py", line 3, in <module>
mnist=input_data.read_data_sets("/path/to/MNIST_data/",one_hot=True)
File "/Library/Python/anaconda/lib/python3.6/site-packages/tensorflow/contrib/learn/python/learn/datasets/mnist.py", line 235, in read_data_sets
SOURCE_URL + TRAIN_IMAGES)
File "/Library/Python/anaconda/lib/python3.6/site-packages/tensorflow/contrib/learn/python/learn/datasets/base.py", line 205, in maybe_download
gfile.MakeDirs(work_directory)
File "/Library/Python/anaconda/lib/python3.6/site-packages/tensorflow/python/lib/io/file_io.py", line 367, in recursive_create_dir
pywrap_tensorflow.RecursivelyCreateDir(compat.as_bytes(dirname), status)
File "/Library/Python/anaconda/lib/python3.6/contextlib.py", line 89, in __exit__
next(self.gen)
File "/Library/Python/anaconda/lib/python3.6/site-packages/tensorflow/python/framework/errors_impl.py", line 466, in raise_exception_on_not_ok_status
pywrap_tensorflow.TF_GetCode(status))
tensorflow.python.framework.errors_impl.PermissionDeniedError: /path
[Finished in 6.7s with exit code 1]
[shell_cmd: python -u "/Users/liyu/Desktop/python_work/MNIST.py"]
[dir: /Users/liyu/Desktop/python_work]
[path: /usr/bin:/bin:/usr/sbin:/sbin]

新人一个，错误有点长，不知道截取哪段合适，就全复制过来了，望各位见谅。
我感觉是我的路径出错了，正常情况感觉应该直接下载数据到路径下，但是出现这个错误，恶心一上午了，跪求各位帮忙解决一下。拜谢拜谢！！！！