code: def configure():
      """Initialized configuration of polys module."""
      from os import getenv
  
      for key, default in _default_config.items():
          value = getenv("SYMPY_" + key)
  
          if value is not None:
              try:
                  _current_config[key] = eval(value)
              except NameError:
                  _current_config[key] = value
          else:
              _current_config[key] = default
  
imports: from contextlib import contextmanager
label_desc: Use image node_id 4 for calling a global function with example usage: configure() without return types