code: def get_side_effect(self, key):
      raise self.Error()
  
imports: import pytest
  from jinja2 import Environment
  from jinja2.bccache import Bucket
  from jinja2.bccache import FileSystemBytecodeCache
  from jinja2.bccache import MemcachedBytecodeCache
  from jinja2.exceptions import TemplateNotFound
label_desc: Use image node_id 3 for calling the MockMemcached obj's underlying member method code with example usage: obj.get_side_effect(key) without return types