pytorch1.7 is not completely support.'inplace'! 'inplace'! 'inplace'!

[cww97]

Before submitting a bug report, please be aware that your issue must be reproducible with all of the following, otherwise it is non-actionable, and we can not help you:

• Current repo: run git fetch && git status -uno to check and git pull to update repo
• Common dataset: coco.yaml or coco128.yaml
• Common environment: Colab, Google Cloud, or Docker image. See https://github.com/ultralytics/yolov5#environments

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🐛 Bug

A clear and concise description of what the bug is.

your requirements.txt said pytorch>=1.7, on cpu this is fine, but when I ran it on GPU, yeah, boom
I fixed it from [here](https://github.com/ultralytics/yolov5/issues/1265#issuecomment-723497340),
yes, downgrade pytorch into 1.6.

To Reproduce (REQUIRED)

Input:

$ python detect.py --source ./inference/images/ --weights yolov5s.pt --conf 0.4

Output:

Traceback (most recent call last):
  File "detect.py", line 188, in <module>
    detect()
  File "detect.py", line 69, in detect
    _ = model(img.half() if half else img) if device.type != 'cpu' else None  # run once
  File "/opt/chenweiwen/anaconda3/lib/python3.7/site-packages/torch/nn/modules/module.py", line 727, in _call_impl
    result = self.forward(*input, **kwargs)
  File "/opt/chenweiwen/sec-model-code/yolov5/models/yolo.py", line 112, in forward
    return self.forward_once(x, profile)  # single-scale inference, train
  File "/opt/chenweiwen/sec-model-code/yolov5/models/yolo.py", line 132, in forward_once
    x = m(x)  # run
  File "/opt/chenweiwen/anaconda3/lib/python3.7/site-packages/torch/nn/modules/module.py", line 727, in _call_impl
    result = self.forward(*input, **kwargs)
  File "/opt/chenweiwen/sec-model-code/yolov5/models/common.py", line 88, in forward
    return self.conv(torch.cat([x[..., ::2, ::2], x[..., 1::2, ::2], x[..., ::2, 1::2], x[..., 1::2, 1::2]], 1))
  File "/opt/chenweiwen/anaconda3/lib/python3.7/site-packages/torch/nn/modules/module.py", line 727, in _call_impl
    result = self.forward(*input, **kwargs)
  File "/opt/chenweiwen/sec-model-code/yolov5/models/common.py", line 32, in fuseforward
    return self.act(self.conv(x))
  File "/opt/chenweiwen/anaconda3/lib/python3.7/site-packages/torch/nn/modules/module.py", line 727, in _call_impl
    result = self.forward(*input, **kwargs)
  File "/opt/chenweiwen/anaconda3/lib/python3.7/site-packages/torch/nn/modules/activation.py", line 438, in forward
    return F.hardswish(input, self.inplace)
  File "/opt/chenweiwen/anaconda3/lib/python3.7/site-packages/torch/nn/modules/module.py", line 779, in __getattr__
    type(self).__name__, name))
torch.nn.modules.module.ModuleAttributeError: 'Hardswish' object has no attribute 'inplace'

Expected behavior

A clear and concise description of what you expected to happen.

Environment

If applicable, add screenshots to help explain your problem.

• OS: [centOS 7]
• GPU [Tesla M60]

Additional context

Add any other context about the problem here.

[github-actions]

👋 Hello @cww97, thank you for your interest in 🚀 YOLOv5! Please visit our ⭐️ Tutorials to get started, where you can find quickstart guides for simple tasks like Custom Data Training all the way to advanced concepts like Hyperparameter Evolution.

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Requirements

Python 3.8 or later with all requirements.txt dependencies installed, including torch>=1.7. To install run:

$ pip install -r requirements.txt

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[glenn-jocher]

@cww97 our Colab notebook runs 1.7.0 on GPU perfectly well. Everything is working correctly on all OSs if you meet the requirements.

[wwdok]

You don't have to downgrade torch version, just refer to this, it works for me !