code: def read_env(path=None, environ=None, recurse=True):
      
      environ = environ if environ is not None else os.environ
  
      # By default, start search from the same file this function is called
      if path is None:
          frame = inspect.currentframe().f_back
          caller_dir = os.path.dirname(frame.f_code.co_filename)
          path = os.path.join(os.path.abspath(caller_dir), ENV)
      if recurse:
          current = path
          pardir = os.path.abspath(os.path.join(current, os.pardir))
          while current != pardir:
              target = os.path.join(current, ENV)
              if os.path.exists(target):
                  path = os.path.abspath(target)
                  break
              else:
                  current = os.path.abspath(os.path.join(current, os.pardir))
                  pardir = os.path.abspath(os.path.join(current, os.pardir))
          if not path:
              raise FileNotFoundError('Could not find a .env file')
  
      with open(path, 'r') as fp:
          content = fp.read()
      parsed = parse_env(content)
      for key, value in parsed.items():
          environ.setdefault(key, value)
docs: Reads a .env file into ``environ`` (which defaults to ``os.environ``).
      If .env is not found in the directory from which this function is called, recurse
      up the directory tree until a .env file is found.