class_docstr: A Filter requiring that assets produce True for at least one day in the
  last ``window_length`` days.
  
  **Default Inputs:** None
  
  **Default Window Length:** None
code: def compute(self, today, assets, out, arg):
      out[:] = arg.sum(axis=0) > 0
  
file_path: catalyst/catalyst/pipeline/filters/smoothing.py
imports: from .filter import CustomFilter
label_desc: Use image node_id 1 for calling the Any obj's underlying member method code with example usage: obj.compute(today, assets, out, arg) without return types