Yolov8 PyTorch出現 An attempt has been made to start a new pro－中壢網頁設計

from ultralytics import YOLO
# Load a model
model = YOLO("yolov8n.yaml") # build a new model from scratch
model = YOLO("yolov8n.pt") # load a pretrained model (recommended for training)
if __name__ == '__main__':
# Use the model
model.train(data="coco128.yaml", epochs=3) # train the model
metrics = model.val() # evaluate model performance on the validation set
results = model("https://ultralytics.com/images/bus.jpg") # predict on an image
path = model.export(format="onnx") # export the model to ONNX format

複製代碼

近重新調試一段pytorch 程式碼，以前的伺服器上完全沒問題，但換了一台機械，從新安裝了新版本的cuda， anaconda ，pytorch 等，以前的程式碼呈現各類版本不合適的問題。
問題：
而今說說這個問題。運行pytorch 時呈現的環境如下：

RuntimeError:
An attempt has been made to start a new process before the
current process has finished its bootstrapping phase.
This probably means that you are not using fork to start your
child processes and you have forgotten to use the proper idiom
in the main module:
if __name__ == '__main__':
freeze_support()
...
The "freeze_support()" line can be omitted if the program
is not going to be frozen to produce an executable.

複製代碼

試過，有用，一次經由過程。

2. 不利用多線程，也就是去掉num_workers 參數，或設定 num_workers=0。

（今朝還沒試過，因為我仍是想用多履行緒。）

文章出處： NetYea 網頁設計

參考文章
https://blog.csdn.net/u014546828/article/details/109235539

Yolov8 PyTorch泛起 An attempt ha

緣由：
在網上查找結果，原因是多曆程的緣由。具體可參考博文：Python 中的if __name__ == '__main__' 該若何理解。

解決方式：
既然是多履行緒的緣由，那麼可以從兩個角度解決問題：

1. 程式碼在運行 epoch 之前，加上 if __name__=='__main__'