Why am I getting a warning of named tensors but when I ask for the names I can't see them?

pytorch is warning me of named tensors…but I don’t see any…what is going on?

x = torch.max_pool2d(input, kernel_size, stride, padding, dilation, ceil_mode)
<ipython-input-3-b78ccc85411a>:1: UserWarning: Named tensors and all their associated APIs are an experimental feature and subject to change. Please do not use them for anything important until they are released as stable. (Triggered internally at  /tmp/pip-req-build-accccgfm/c10/core/TensorImpl.h:1156.)
  x = torch.max_pool2d(input, kernel_size, stride, padding, dilation, ceil_mode)
x.names
Out[4]: (None, None, None, None)
input.names
Out[5]: (None, None, None, None)

the tensor is:

input
Out[6]: 
tensor([[[[0.0000e+00, 5.3843e-01, 3.2706e-01,  ..., 0.0000e+00,
           0.0000e+00, 4.7521e-01],
          [0.0000e+00, 0.0000e+00, 0.0000e+00,  ..., 0.0000e+00,
           1.1444e+00, 5.4548e-01],
          [3.5387e-01, 3.4596e-01, 7.5767e-01,  ..., 5.9062e-01,
           0.0000e+00, 0.0000e+00],
          ...,
          [8.5284e-01, 6.1768e-01, 2.6013e-01,  ..., 0.0000e+00,
           0.0000e+00, 0.0000e+00],
          [3.2465e-01, 0.0000e+00, 1.3492e+00,  ..., 1.9810e-01,
           0.0000e+00, 0.0000e+00],
          [0.0000e+00, 1.2310e+00, 1.1530e+00,  ..., 0.0000e+00,
           5.1107e-01, 1.3043e-01]],
         [[0.0000e+00, 2.4027e+00, 0.0000e+00,  ..., 8.2062e-01,
           0.0000e+00, 1.1750e+00],
          [0.0000e+00, 4.4811e-01, 1.1390e+00,  ..., 0.0000e+00,
           8.5415e-01, 0.0000e+00],
          [7.2516e-01, 0.0000e+00, 0.0000e+00,  ..., 0.0000e+00,
           3.0788e-01, 0.0000e+00],
          ...,
          [3.2195e-01, 0.0000e+00, 7.5724e-01,  ..., 0.0000e+00,
           1.3083e+00, 1.5439e+00],
          [6.8650e-01, 3.1598e-01, 0.0000e+00,  ..., 1.8237e+00,
           0.0000e+00, 1.9643e+00],
          [0.0000e+00, 1.5988e+00, 0.0000e+00,  ..., 9.7256e-02,
           2.3014e-01, 7.7640e-02]],
         [[3.9484e-01, 0.0000e+00, 0.0000e+00,  ..., 0.0000e+00,
           0.0000e+00, 7.6755e-01],
          [1.2628e+00, 7.8810e-02, 0.0000e+00,  ..., 1.9742e+00,
           0.0000e+00, 0.0000e+00],
          [0.0000e+00, 0.0000e+00, 1.0417e+00,  ..., 0.0000e+00,
           7.0454e-01, 3.1250e-01],
          ...,
          [1.9359e-01, 0.0000e+00, 9.8210e-01,  ..., 0.0000e+00,
           3.8394e-01, 0.0000e+00],
          [0.0000e+00, 3.2974e-01, 0.0000e+00,  ..., 0.0000e+00,
           0.0000e+00, 2.0021e-01],
          [0.0000e+00, 0.0000e+00, 0.0000e+00,  ..., 5.9649e-01,
           0.0000e+00, 0.0000e+00]],
         ...,
         [[0.0000e+00, 0.0000e+00, 8.5655e-01,  ..., 0.0000e+00,
           0.0000e+00, 1.0052e+00],
          [3.6246e-01, 0.0000e+00, 0.0000e+00,  ..., 0.0000e+00,
           1.8805e+00, 0.0000e+00],
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          ...,
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           3.1190e-01, 0.0000e+00]],
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           6.3913e-01, 0.0000e+00],
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           0.0000e+00, 0.0000e+00],
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           0.0000e+00, 0.0000e+00],
          ...,
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           1.7696e+00, 1.3127e+00],
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           6.0881e-01, 0.0000e+00],
          [1.0152e+00, 1.1613e+00, 3.6996e-02,  ..., 0.0000e+00,
           2.8808e-01, 0.0000e+00]],
         [[1.3395e+00, 0.0000e+00, 1.0644e-01,  ..., 0.0000e+00,
           8.8641e-01, 1.4134e+00],
          [7.6206e-01, 0.0000e+00, 0.0000e+00,  ..., 4.9055e-01,
           5.4889e-01, 7.2144e-02],
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           1.8425e+00, 0.0000e+00],
          ...,
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           5.4228e-01, 6.7642e-01],
          [0.0000e+00, 0.0000e+00, 1.0298e+00,  ..., 6.9759e-01,
           3.5460e-01, 1.5688e-01]]],
        [[[0.0000e+00, 0.0000e+00, 8.3083e-01,  ..., 8.2208e-01,
           0.0000e+00, 3.3902e-01],
          [4.5702e-01, 1.1061e+00, 0.0000e+00,  ..., 0.0000e+00,
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           0.0000e+00, 1.0915e-01],
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           0.0000e+00, 1.2258e-01],
          [7.9742e-01, 6.2433e-01, 0.0000e+00,  ..., 1.5049e+00,
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          ...,
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          ...,
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           7.7306e-01, 3.8062e-01],
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           1.1679e+00, 0.0000e+00]],
         ...,
         [[7.2572e-02, 0.0000e+00, 0.0000e+00,  ..., 1.2981e+00,
           0.0000e+00, 7.5984e-01],
          [1.0215e+00, 1.2642e+00, 0.0000e+00,  ..., 0.0000e+00,
           0.0000e+00, 1.2246e+00],
          [5.2841e-01, 0.0000e+00, 1.0517e+00,  ..., 6.2395e-01,
           0.0000e+00, 0.0000e+00],
          ...,
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           7.9032e-02, 4.8557e-01],
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          ...,
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          ...,
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           1.3346e+00, 2.1078e+00],
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           9.0906e-02, 0.0000e+00]]],
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           2.9468e-01, 1.0412e+00],
          ...,
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          ...,
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           4.2170e-01, 5.1668e-01]],
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          ...,
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           9.6890e-01, 0.0000e+00],
          [0.0000e+00, 0.0000e+00, 0.0000e+00,  ..., 0.0000e+00,
           1.0135e+00, 2.8619e-01]],
         ...,
         [[0.0000e+00, 1.4298e-01, 1.4583e-01,  ..., 0.0000e+00,
           0.0000e+00, 2.1926e-01],
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           0.0000e+00, 0.0000e+00],
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           1.0836e+00, 9.5980e-01],
          ...,
          [0.0000e+00, 4.0301e-01, 1.8300e+00,  ..., 0.0000e+00,
           0.0000e+00, 8.7928e-01],
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           0.0000e+00, 2.1443e+00],
          [0.0000e+00, 0.0000e+00, 0.0000e+00,  ..., 0.0000e+00,
           0.0000e+00, 0.0000e+00]],
         [[0.0000e+00, 0.0000e+00, 3.5555e-01,  ..., 1.1441e+00,
           2.1699e-01, 7.1550e-01],
          [0.0000e+00, 6.5907e-01, 0.0000e+00,  ..., 0.0000e+00,
           0.0000e+00, 0.0000e+00],
          [0.0000e+00, 0.0000e+00, 2.0855e+00,  ..., 0.0000e+00,
           0.0000e+00, 4.2980e-01],
          ...,
          [1.5165e+00, 2.4846e-01, 9.7999e-01,  ..., 0.0000e+00,
           0.0000e+00, 1.3794e+00],
          [2.0921e-01, 0.0000e+00, 1.1321e+00,  ..., 5.9194e-01,
           0.0000e+00, 1.7787e+00],
          [0.0000e+00, 1.3980e-01, 7.5684e-03,  ..., 0.0000e+00,
           0.0000e+00, 0.0000e+00]],
         [[0.0000e+00, 1.0029e+00, 0.0000e+00,  ..., 9.3311e-01,
           5.4762e-01, 2.1139e-01],
          [5.7416e-01, 0.0000e+00, 0.0000e+00,  ..., 1.1260e-01,
           0.0000e+00, 1.2596e+00],
          [5.1453e-01, 0.0000e+00, 9.7247e-01,  ..., 7.4106e-01,
           0.0000e+00, 1.6046e-01],
          ...,
          [0.0000e+00, 3.9179e-01, 0.0000e+00,  ..., 1.6839e+00,
           0.0000e+00, 1.3445e-01],
          [2.7410e-02, 1.2619e+00, 0.0000e+00,  ..., 0.0000e+00,
           0.0000e+00, 0.0000e+00],
          [0.0000e+00, 1.2642e-01, 3.8120e-01,  ..., 0.0000e+00,
           6.6013e-01, 8.9280e-01]]],
        [[[0.0000e+00, 2.3729e-01, 1.7070e-01,  ..., 1.1353e-01,
           1.3327e+00, 0.0000e+00],
          [0.0000e+00, 0.0000e+00, 1.6408e-01,  ..., 6.0199e-01,
           0.0000e+00, 1.8030e-02],
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           1.3867e+00, 7.3637e-01],
          ...,
          [0.0000e+00, 0.0000e+00, 8.9469e-01,  ..., 7.2455e-01,
           1.3070e+00, 0.0000e+00],
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           0.0000e+00, 9.8854e-01],
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           0.0000e+00, 9.0555e-01]],
         [[1.5223e+00, 0.0000e+00, 0.0000e+00,  ..., 7.0300e-01,
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          ...,
          [9.6070e-01, 1.5629e+00, 0.0000e+00,  ..., 1.3924e+00,
           0.0000e+00, 0.0000e+00],
          [0.0000e+00, 7.6587e-01, 0.0000e+00,  ..., 1.2394e+00,
           7.3497e-01, 0.0000e+00],
          [0.0000e+00, 2.4575e-02, 0.0000e+00,  ..., 4.0591e-02,
           0.0000e+00, 0.0000e+00]],
         [[2.8708e-01, 0.0000e+00, 8.7484e-01,  ..., 0.0000e+00,
           0.0000e+00, 1.7880e+00],
          [0.0000e+00, 0.0000e+00, 2.7959e+00,  ..., 0.0000e+00,
           0.0000e+00, 0.0000e+00],
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           0.0000e+00, 0.0000e+00],
          ...,
          [1.2609e-01, 0.0000e+00, 0.0000e+00,  ..., 0.0000e+00,
           0.0000e+00, 8.7795e-01],
          [3.9389e-01, 4.0679e-01, 0.0000e+00,  ..., 0.0000e+00,
           8.4093e-01, 7.4454e-01],
          [6.2753e-01, 0.0000e+00, 1.8964e-01,  ..., 5.5085e-01,
           5.3822e-02, 3.4173e-01]],
         ...,
         [[7.2486e-01, 4.6403e-04, 1.6452e-01,  ..., 0.0000e+00,
           7.9595e-01, 1.0951e+00],
          [7.5681e-01, 0.0000e+00, 2.1609e-02,  ..., 8.8101e-01,
           0.0000e+00, 1.3852e-01],
          [0.0000e+00, 0.0000e+00, 1.3872e+00,  ..., 0.0000e+00,
           0.0000e+00, 0.0000e+00],
          ...,
          [0.0000e+00, 0.0000e+00, 1.8147e+00,  ..., 0.0000e+00,
           2.1428e-01, 5.0763e-01],
          [1.8989e-01, 1.9251e+00, 0.0000e+00,  ..., 1.2933e+00,
           0.0000e+00, 1.4109e-01],
          [1.0464e+00, 0.0000e+00, 0.0000e+00,  ..., 7.2314e-01,
           0.0000e+00, 1.5447e+00]],
         [[6.5672e-01, 8.8381e-02, 0.0000e+00,  ..., 1.1558e+00,
           3.6011e-01, 0.0000e+00],
          [0.0000e+00, 3.0102e-01, 0.0000e+00,  ..., 0.0000e+00,
           0.0000e+00, 4.8790e-01],
          [1.6768e+00, 0.0000e+00, 1.8726e-01,  ..., 3.6481e-02,
           1.2215e+00, 7.3722e-01],
          ...,
          [6.6561e-01, 0.0000e+00, 1.2700e+00,  ..., 1.3990e+00,
           9.3496e-01, 1.3797e+00],
          [0.0000e+00, 9.7489e-02, 0.0000e+00,  ..., 1.1864e+00,
           9.7903e-01, 4.2837e-01],
          [0.0000e+00, 0.0000e+00, 8.1179e-01,  ..., 0.0000e+00,
           0.0000e+00, 6.1072e-01]],
         [[4.9630e-01, 0.0000e+00, 0.0000e+00,  ..., 0.0000e+00,
           0.0000e+00, 8.9547e-01],
          [7.2495e-01, 0.0000e+00, 8.6785e-01,  ..., 0.0000e+00,
           1.0072e+00, 3.3873e-01],
          [0.0000e+00, 0.0000e+00, 2.4915e-01,  ..., 0.0000e+00,
           3.4924e-01, 0.0000e+00],
          ...,
          [5.2499e-02, 9.1254e-01, 0.0000e+00,  ..., 2.7929e-01,
           0.0000e+00, 2.8307e-01],
          [5.0577e-01, 4.8957e-01, 0.0000e+00,  ..., 1.1805e+00,
           0.0000e+00, 1.0580e+00],
          [6.6028e-01, 0.0000e+00, 1.8995e-01,  ..., 3.3843e-01,
           0.0000e+00, 2.4419e-01]]],
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x is:

x
Out[7]: 
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           3.3441e-01, 8.9280e-01]]],
        [[[2.3729e-01, 1.5527e+00, 6.4464e-01,  ..., 1.4779e+00,
           1.0653e+00, 1.3327e+00],
          [1.0081e+00, 1.1612e+00, 4.5679e-01,  ..., 1.7774e+00,
           1.1143e+00, 1.3867e+00],
          [1.2310e+00, 2.0448e+00, 1.1138e+00,  ..., 1.2221e+00,
           1.7166e+00, 5.9102e-01],
          ...,
          [2.8988e+00, 6.9693e-01, 7.9771e-01,  ..., 1.1441e+00,
           2.5637e+00, 2.2548e-01],
          [9.0298e-01, 8.9469e-01, 1.7738e+00,  ..., 8.6764e-01,
           8.4269e-01, 1.3070e+00],
          [0.0000e+00, 2.6492e-01, 1.0816e+00,  ..., 7.7654e-01,
           1.4380e+00, 9.8854e-01]],
         [[1.5223e+00, 3.9039e-01, 1.0789e+00,  ..., 4.1485e-01,
           9.4753e-01, 0.0000e+00],
          [6.6915e-01, 1.0939e+00, 8.5799e-01,  ..., 1.5935e+00,
           2.3102e+00, 3.4305e-01],
          [1.7238e+00, 8.4443e-01, 1.9302e-01,  ..., 1.8646e+00,
           1.5917e+00, 1.9309e+00],
          ...,
          [1.0889e+00, 4.5397e-01, 5.4794e-01,  ..., 6.3298e-01,
           1.1659e+00, 3.6924e-01],
          [1.5629e+00, 3.2949e-01, 6.3233e-01,  ..., 1.3848e+00,
           1.3924e+00, 0.0000e+00],
          [7.6587e-01, 6.6352e-01, 7.3664e-01,  ..., 1.1522e-01,
           1.2394e+00, 7.3497e-01]],
         [[2.8708e-01, 2.7959e+00, 2.1041e+00,  ..., 1.1096e+00,
           2.8994e+00, 1.7880e+00],
          [1.8169e+00, 8.9332e-01, 2.1828e-01,  ..., 2.0178e+00,
           1.7340e-03, 1.2571e+00],
          [2.1664e+00, 2.3372e-01, 1.5302e+00,  ..., 1.1687e+00,
           9.8900e-01, 2.4151e-01],
          ...,
          [1.3636e+00, 1.3580e+00, 1.5674e+00,  ..., 4.6595e-01,
           2.3934e+00, 8.2950e-01],
          [1.2609e-01, 1.1309e+00, 1.2588e+00,  ..., 1.0461e+00,
           0.0000e+00, 9.7213e-01],
          [6.2753e-01, 1.0755e+00, 0.0000e+00,  ..., 1.5074e+00,
           1.7027e+00, 8.4093e-01]],
         ...,
         [[7.5681e-01, 1.7562e+00, 5.4640e-01,  ..., 1.5172e+00,
           8.8101e-01, 1.0951e+00],
          [8.3430e-02, 1.3872e+00, 7.5180e-01,  ..., 1.4020e+00,
           1.8824e+00, 7.3132e-01],
          [2.0790e+00, 1.5023e+00, 9.9930e-01,  ..., 2.1562e-02,
           6.5822e-01, 1.0117e+00],
          ...,
          [1.5037e+00, 2.1653e-01, 4.7289e-01,  ..., 4.5720e-01,
           7.7384e-01, 1.0805e+00],
          [0.0000e+00, 1.8147e+00, 9.7578e-01,  ..., 8.7514e-01,
           1.4704e+00, 5.0763e-01],
          [1.9251e+00, 1.1462e+00, 1.7292e+00,  ..., 0.0000e+00,
           1.2933e+00, 1.5447e+00]],
         [[6.5672e-01, 1.6027e+00, 6.7840e-01,  ..., 1.3574e+00,
           1.1558e+00, 4.8790e-01],
          [1.6768e+00, 1.8726e-01, 2.0162e+00,  ..., 1.6746e+00,
           4.5887e-01, 3.2568e+00],
          [2.1064e+00, 4.3237e-01, 7.2862e-01,  ..., 8.2338e-01,
           1.1171e+00, 9.0309e-01],
          ...,
          [3.4308e-01, 1.7224e-01, 1.7943e+00,  ..., 2.0401e-02,
           0.0000e+00, 7.1825e-01],
          [8.8047e-01, 1.2700e+00, 6.4981e-01,  ..., 3.6709e-01,
           1.3990e+00, 1.3797e+00],
          [9.7489e-02, 9.7887e-01, 9.0833e-01,  ..., 1.1309e+00,
           1.1864e+00, 9.7903e-01]],
         [[7.2495e-01, 8.6785e-01, 4.7979e-01,  ..., 1.5764e+00,
           1.8856e+00, 1.0072e+00],
          [4.9575e-01, 1.7974e+00, 0.0000e+00,  ..., 2.5473e+00,
           1.5303e+00, 3.4924e-01],
          [1.6691e+00, 1.7986e+00, 4.8643e-01,  ..., 1.1812e+00,
           9.3659e-01, 1.4361e+00],
          ...,
          [1.6720e+00, 2.1760e-01, 3.7562e-01,  ..., 4.6474e-02,
           1.0041e-01, 8.1983e-01],
          [9.1254e-01, 1.1050e+00, 8.1513e-01,  ..., 2.3363e+00,
           2.7929e-01, 2.8307e-01],
          [6.6028e-01, 1.9937e+00, 1.2175e+00,  ..., 5.9344e-01,
           1.1805e+00, 1.0580e+00]]],
        [[[4.9783e-01, 5.4044e-01, 1.2952e+00,  ..., 1.8203e+00,
           0.0000e+00, 1.7924e+00],
          [1.5045e+00, 1.4000e+00, 6.8046e-01,  ..., 4.4032e-01,
           1.3178e+00, 9.4335e-01],
          [6.7696e-01, 1.0426e+00, 2.9748e-01,  ..., 5.8655e-01,
           0.0000e+00, 1.5867e+00],
          ...,
          [0.0000e+00, 1.1507e+00, 2.3877e+00,  ..., 8.9435e-01,
           1.0847e+00, 8.2139e-01],
          [9.6816e-01, 1.9460e+00, 1.0309e+00,  ..., 1.1532e+00,
           4.5137e-01, 3.3290e+00],
          [0.0000e+00, 2.1589e+00, 7.3381e-02,  ..., 1.6541e+00,
           2.3491e-01, 1.0995e+00]],
         [[2.3749e-01, 4.9483e-01, 8.4752e-01,  ..., 8.0691e-01,
           1.2070e+00, 1.9448e+00],
          [6.6949e-01, 9.3643e-01, 3.6360e-01,  ..., 2.9275e+00,
           1.9337e+00, 5.5102e-01],
          [1.8632e+00, 3.8422e-01, 3.1392e+00,  ..., 0.0000e+00,
           7.3696e-01, 1.0909e+00],
          ...,
          [8.6410e-01, 9.2548e-01, 7.2609e-01,  ..., 1.9130e+00,
           8.6042e-01, 8.5166e-01],
          [0.0000e+00, 1.5819e+00, 1.4980e+00,  ..., 1.1185e+00,
           0.0000e+00, 3.5652e-01],
          [1.0054e+00, 6.1926e-01, 1.5844e+00,  ..., 2.5573e+00,
           1.0482e+00, 4.7188e-01]],
         [[1.9520e+00, 4.2442e-01, 6.0336e-01,  ..., 7.2179e-01,
           2.1821e+00, 9.3610e-01],
          [1.0894e+00, 9.3075e-01, 1.6353e+00,  ..., 1.3643e+00,
           3.3445e-01, 7.4993e-01],
          [3.5319e-01, 1.0376e+00, 5.4286e-01,  ..., 1.1796e+00,
           7.5896e-01, 1.2538e+00],
          ...,
          [1.5101e+00, 0.0000e+00, 2.7346e+00,  ..., 9.6357e-01,
           1.2376e+00, 2.1593e+00],
          [1.0692e+00, 8.7869e-01, 0.0000e+00,  ..., 1.7987e+00,
           5.0471e-01, 9.5322e-01],
          [1.4972e+00, 1.6384e+00, 1.0818e+00,  ..., 1.0104e+00,
           1.2648e+00, 5.6929e-01]],
         ...,
         [[1.7058e+00, 1.8254e-01, 1.2182e+00,  ..., 4.3517e-01,
           9.5193e-01, 5.5203e-01],
          [7.8783e-01, 3.9746e-01, 3.5398e-01,  ..., 9.3809e-01,
           6.5839e-01, 8.9188e-01],
          [5.7709e-01, 6.6545e-01, 7.2953e-02,  ..., 1.8893e-01,
           5.7627e-01, 6.8675e-01],
          ...,
          [7.1194e-01, 6.3135e-02, 1.6259e+00,  ..., 1.1319e+00,
           5.2472e-01, 5.7714e-01],
          [1.1258e+00, 8.1807e-01, 1.5696e+00,  ..., 1.5393e+00,
           3.6371e-01, 8.6303e-01],
          [1.4386e+00, 1.0723e+00, 1.8295e-01,  ..., 1.3698e-01,
           1.6804e+00, 8.8588e-01]],
         [[1.0406e+00, 5.0063e-01, 5.3062e-01,  ..., 1.2293e+00,
           1.5674e+00, 1.3395e+00],
          [1.7844e-01, 1.7899e-01, 0.0000e+00,  ..., 1.3836e+00,
           1.9117e+00, 4.7468e-01],
          [1.0353e+00, 1.0924e+00, 1.2454e+00,  ..., 1.5356e+00,
           1.0406e+00, 2.7322e+00],
          ...,
          [1.5641e+00, 8.9018e-01, 1.2660e+00,  ..., 1.3264e+00,
           0.0000e+00, 3.0450e-01],
          [8.9060e-01, 8.6980e-01, 1.0308e+00,  ..., 7.7634e-01,
           4.3928e-01, 0.0000e+00],
          [2.0902e+00, 1.0553e+00, 1.2154e+00,  ..., 6.6964e-01,
           1.8768e-01, 9.2617e-01]],
         [[1.3865e+00, 1.9378e-01, 1.2960e+00,  ..., 1.4006e+00,
           1.2442e+00, 1.7737e+00],
          [3.5963e-01, 8.4980e-01, 1.4782e-02,  ..., 8.7469e-01,
           6.7934e-01, 1.1449e+00],
          [6.5940e-01, 1.0049e+00, 6.5713e-01,  ..., 2.0074e-01,
           1.4813e+00, 1.6567e+00],
          ...,
          [6.0294e-01, 9.2160e-01, 3.5993e-01,  ..., 1.3910e-01,
           5.4766e-01, 1.8360e+00],
          [0.0000e+00, 8.3390e-01, 1.7166e+00,  ..., 1.6702e+00,
           1.7262e-01, 4.1978e-01],
          [2.0762e+00, 1.0201e+00, 1.1364e+00,  ..., 2.1812e+00,
           2.2239e+00, 9.0114e-01]]]], grad_fn=<MaxPool2DWithIndicesBackward>)

Probably the same issue as described here.

1 Like

You can ignore it and update PyTorch (and torchvision) to the latest release, as the warning was unhelpful and was removed.