code: def parse_key(key):
      """Helper to format keys"""
      key = key.split(".")
      case_est, draw = ".".join(key[:-1]), key[-1]
      return case_est, draw
  
file_path: mlens/mlens/model_selection/_base_functions.py
imports: from __future__ import division
  from collections import Counter
  from ..parallel import EvalLearner, EvalTransformer, Pipeline
  from ..utils.formatting import _assert_format
  from ..utils.checks import assert_valid_estimator
  from ..externals.sklearn.base import clone
label_desc: Use image node_id 1 for calling a global function with example usage: parse_key(key) and returns: case_est,  draw