why there is KeyError: -1 in prediction

[tianke0711]

when code run here::

prediction_output = [[reversed_dict[y] for y in x] for x in prediction[:, 0, :]]

    with open("result.txt", "a") as f:
        for line in prediction_output:
            summary = list()
            for word in line:
                if word == "</s>":
                    break
                if word not in summary:
                    summary.append(word)
            print(" ".join(summary), file=f)

print('Summaries are saved to "result.txt"...')

there is error:

---

KeyError Traceback (most recent call last)
in
27 print('prediction:', prediction.shape)
28
---> 29 prediction_output = [[reversed_dict[y] for y in x] for x in prediction[:, 0, :]]
30
31

in (.0)
27 print('prediction:', prediction.shape)
28
---> 29 prediction_output = [[reversed_dict[y] for y in x] for x in prediction[:, 0, :]]
30
31

in (.0)
27 print('prediction:', prediction.shape)
28
---> 29 prediction_output = [[reversed_dict[y] for y in x] for x in prediction[:, 0, :]]
30
31

KeyError: -1

[dongjun-Lee]

Which tensorflow version are you using?

[tianke0711]

hi @dongjun-Lee thanks for your response, I am using tensorflow==1.4.1.
Could you left you email that so I can contact you to ask question, please!

[dongjun-Lee]

Hi @tianke0711 , it seems the error occurs because of your tensorflow version. Could you please try after upgrading tensorflow to >=1.8?
My e-mail is ganji1055@gmail.com.
Thank you.

[tianke0711]

Hi @tianke0711 , it seems the error occurs because of your tensorflow version. Could you please try after upgrading tensorflow to >=1.8?
My e-mail is ganji1055@gmail.com.
Thank you.

thanks for your kind comments. If I have issues, I will contact you.

[deepbodra97]

I am also getting a similar error

Traceback (most recent call last):
  File "test.py", line 36, in <module>
    prediction_output = [[reversed_dict[y] for y in x] for x in prediction[:, 0, :]]
  File "test.py", line 36, in <listcomp>
    prediction_output = [[reversed_dict[y] for y in x] for x in prediction[:, 0, :]]
  File "test.py", line 36, in <listcomp>
    prediction_output = [[reversed_dict[y] for y in x] for x in prediction[:, 0, :]]
KeyError: -1

[yash-1997]

Hi @tianke0711 , it seems the error occurs because of your tensorflow version. Could you please try after upgrading tensorflow to >=1.8?
My e-mail is ganji1055@gmail.com.
Thank you.

thanks for your kind comments. If I have issues, I will contact you.

Has upgrading to a higher version of tensorflow worked?

[yash-1997]

I am also getting a similar error

Traceback (most recent call last):
  File "test.py", line 36, in <module>
    prediction_output = [[reversed_dict[y] for y in x] for x in prediction[:, 0, :]]
  File "test.py", line 36, in <listcomp>
    prediction_output = [[reversed_dict[y] for y in x] for x in prediction[:, 0, :]]
  File "test.py", line 36, in <listcomp>
    prediction_output = [[reversed_dict[y] for y in x] for x in prediction[:, 0, :]]
KeyError: -1

Were you able to resolve the issue? If so, how?