class_docstr: This is used for formatting strings with values that need to be updated
  at that time, such as the current time or working directory.
code: def __call__(self, **kwargs):
      self.kwargs.update(kwargs)
      return self.func(*self.args, **self.kwargs)
  
file_path: catboost/contrib/python/ipython/py2/IPython/core/prompts.py
imports: from IPython.utils import py3compat
label_desc: Use image node_id 2 for calling the LazyEvaluate obj's underlying member method code with example usage: obj.__call__() and returns: self