code: def _extract_key_val(kv, delimiter='='):
      '''Extract key and value from key=val string.
  
      Example:
      >>> _extract_key_val('foo=bar')
      ('foo', 'bar')
      '''
      pieces = kv.split(delimiter)
      key = pieces[0]
      val = delimiter.join(pieces[1:])
      return key, vaf _extract_key_val(kv, delimiter='='):
      '''Extract key and value from key=val string.
  
      Example:
      >>> _extract_key_val('foo=bar')
      ('foo', 'bar')
      '''
      pieces = kv.split(delimiter)
      key = pieces[0]
      val = delimiter.join(pieces[1:])
      return key, val
docs: Extract key and value from key=val string.
  
      Example:
      >>> _extract_key_val('foo=bar')
      ('foo', 'bar')