code: def __enter__(self):
      return self
  
imports: import os
  import sys
  from ._compat import _default_text_stderr
  from ._compat import _default_text_stdout
  from ._compat import auto_wrap_for_ansi
  from ._compat import binary_streams
  from ._compat import filename_to_ui
  from ._compat import get_filesystem_encoding
  from ._compat import get_streerror
  from ._compat import is_bytes
  from ._compat import open_stream
  from ._compat import PY2
  from ._compat import should_strip_ansi
  from ._compat import string_types
  from ._compat import strip_ansi
  from ._compat import text_streams
  from ._compat import text_type
  from ._compat import WIN
  from .globals import resolve_color_default
label_desc: Use image node_id 3 for calling the KeepOpenFile obj's underlying member method code with example usage: obj.__enter__() and returns: self