警告过滤器忽略“一次”

Question

似乎我只能将警告模块设置为全部或无，我正在尝试确定原因

在我的脚本顶部，我使用了

warnings.simplefilter(action='once') 或 warnings.simplefilter(action='ignore')

当我将操作设置为ignore时，它会按预期隐藏所有警告。但是，当我将操作设置为once时，它会在每次调用我的函数时打印警告（在循环中，从脚本中的另一个函数）。例：

/home/ec2-user/predict_evaluate/gt_ops.py:203: UserWarning: Too many positive examples of class {label} to balance dataset! Try increasing predict limit. warnings.warn(msg) /home/ec2-user/predict_evaluate/gt_ops.py:203: UserWarning: Too many positive examples of class {label} to balance dataset! Try increasing predict limit. warnings.warn(msg) /home/ec2-user/predict_evaluate/gt_ops.py:203: UserWarning: Too many positive examples of class {label} to balance dataset! Try increasing predict limit. warnings.warn(msg)

阻止action=once工作的原因是什么