code: def merge_a_into_b(a: dict, b: dict) -> dict:
      b = b.copy()
      for k, v in a.items():
          if isinstance(v, dict) and k in b:
              v.pop(DELETE_KEY, False)
              b[k] = merge_a_into_b(v, b[k])
          else:
              b[k] = v
      return b
  
file_path: qlib/qlib/rl/contrib/naive_config_parser.py
imports: import os
  import platform
  import shutil
  import sys
  import tempfile
  from importlib import import_module
  import yaml
label_desc: Use image node_id 1 for calling a global function with example usage: merge_a_into_b(a, b) and returns: b