class_docstr: Class to temporarily catch sys.displayhook
code: def __call__(self, output):
      self.output = output
  
file_path: altair/altair/utils/execeval.py
imports: import ast
  import sys
label_desc: Use image node_id 4 for calling the _CatchDisplay obj's underlying member method code with example usage: obj.__call__(output) without return types