code: def __init__(self, sigma: float):
      assert sigma >= 0, "Sigma cannot be a negative number"
      self.sigma = sigma
  
imports: from typing import List
  from augly.video.augmenters.ffmpeg.base_augmenter import BaseVidgearFFMPEGAugmenter
label_desc: Use image node_id 1 to create a new VideoAugmenterByBlur object from inherited base classes: BaseVidgearFFMPEGAugmenter with example: obj = VideoAugmenterByBlur(sigma)