add tensor.item tensor.tolist

[Flowingsun007]

增加以下module、test case、docs

• Tensor.item()
• Tensor.tolist()

docs

[github-actions]

CI failed, removing label automerge

[github-actions]

CI failed, removing label automerge

[jackalcooper]

CI发现问题就解决啊，为什么有很明显的错误不解决又一直把 automerge 加回来呢

[github-actions]

Speed stats:

GPU Name: GeForce GTX 1080 

PyTorch resnet50 time: 138.4ms (= 6922.0ms / 50, input_shape=[16, 3, 224, 224], backward is enabled)
OneFlow resnet50 time: 128.0ms (= 6400.0ms / 50, input_shape=[16, 3, 224, 224], backward is enabled)
Relative speed: 1.08 (= 138.4ms / 128.0ms)

PyTorch resnet50 time: 84.7ms (= 4235.8ms / 50, input_shape=[8, 3, 224, 224], backward is enabled)
OneFlow resnet50 time: 74.4ms (= 3722.3ms / 50, input_shape=[8, 3, 224, 224], backward is enabled)
Relative speed: 1.14 (= 84.7ms / 74.4ms)

PyTorch resnet50 time: 53.2ms (= 2658.1ms / 50, input_shape=[4, 3, 224, 224], backward is enabled)
OneFlow resnet50 time: 49.0ms (= 2450.5ms / 50, input_shape=[4, 3, 224, 224], backward is enabled)
Relative speed: 1.08 (= 53.2ms / 49.0ms)

PyTorch resnet50 time: 48.1ms (= 2405.9ms / 50, input_shape=[2, 3, 224, 224], backward is enabled)
OneFlow resnet50 time: 39.0ms (= 1948.5ms / 50, input_shape=[2, 3, 224, 224], backward is enabled)
Relative speed: 1.23 (= 48.1ms / 39.0ms)

PyTorch resnet50 time: 42.5ms (= 2122.7ms / 50, input_shape=[1, 3, 224, 224], backward is enabled)
OneFlow resnet50 time: 38.1ms (= 1906.2ms / 50, input_shape=[1, 3, 224, 224], backward is enabled)
Relative speed: 1.11 (= 42.5ms / 38.1ms)

[github-actions]

Speed stats:

GPU Name: GeForce GTX 1080 

PyTorch resnet50 time: 140.2ms (= 7010.4ms / 50, input_shape=[16, 3, 224, 224], backward is enabled)
OneFlow resnet50 time: 128.0ms (= 6402.0ms / 50, input_shape=[16, 3, 224, 224], backward is enabled)
Relative speed: 1.10 (= 140.2ms / 128.0ms)

PyTorch resnet50 time: 83.9ms (= 4192.9ms / 50, input_shape=[8, 3, 224, 224], backward is enabled)
OneFlow resnet50 time: 74.5ms (= 3725.0ms / 50, input_shape=[8, 3, 224, 224], backward is enabled)
Relative speed: 1.13 (= 83.9ms / 74.5ms)

PyTorch resnet50 time: 59.4ms (= 2971.0ms / 50, input_shape=[4, 3, 224, 224], backward is enabled)
OneFlow resnet50 time: 47.3ms (= 2364.0ms / 50, input_shape=[4, 3, 224, 224], backward is enabled)
Relative speed: 1.26 (= 59.4ms / 47.3ms)

PyTorch resnet50 time: 49.3ms (= 2464.5ms / 50, input_shape=[2, 3, 224, 224], backward is enabled)
OneFlow resnet50 time: 43.3ms (= 2164.7ms / 50, input_shape=[2, 3, 224, 224], backward is enabled)
Relative speed: 1.14 (= 49.3ms / 43.3ms)

PyTorch resnet50 time: 44.7ms (= 2236.3ms / 50, input_shape=[1, 3, 224, 224], backward is enabled)
OneFlow resnet50 time: 37.0ms (= 1848.7ms / 50, input_shape=[1, 3, 224, 224], backward is enabled)
Relative speed: 1.21 (= 44.7ms / 37.0ms)