some questions about the code

[RumengYi]

1. ubuntu 16.04, tf1.1, py2.7, when I run the main.py, I got the error as below:
   Traceback (most recent call last):
   File "main.py", line 348, in
   main()
   File "main.py", line 277, in main
   image_tensor, label_tensor = data_generator.make_data_tensor(train=False)
   File "/home/yirumeng/code/maml-master/data_generator.py", line 107, in make_data_tensor
   filename_queue = tf.train.string_input_producer(tf.convert_to_tensor(all_filenames), shuffle=False)
   File "/home/yirumeng/anaconda3/envs/tf-py2/lib/python2.7/site-packages/tensorflow/python/training/input.py", line 216, in string_input_producer
   string_tensor = ops.convert_to_tensor(string_tensor, dtype=dtypes.string)
   File "/home/yirumeng/anaconda3/envs/tf-py2/lib/python2.7/site-packages/tensorflow/python/framework/ops.py", line 639, in convert_to_tensor
   as_ref=False)
   File "/home/yirumeng/anaconda3/envs/tf-py2/lib/python2.7/site-packages/tensorflow/python/framework/ops.py", line 704, in internal_convert_to_tensor
   ret = conversion_func(value, dtype=dtype, name=name, as_ref=as_ref)
   File "/home/yirumeng/anaconda3/envs/tf-py2/lib/python2.7/site-packages/tensorflow/python/framework/ops.py", line 577, in _TensorTensorConversionFunction
   % (dtype.name, t.dtype.name, str(t)))
   ValueError: Tensor conversion requested dtype string for Tensor with dtype float32: 'Tensor("Const_17:0", shape=(0,), dtype=float32)'

so how can I solve this problem, thank you.

2. Which version of tf and python do you recommend?