code: def edit_file(self, filename):
      import subprocess
  
      editor = self.get_editor()
      if self.env:
          environ = os.environ.copy()
          environ.update(self.env)
      else:
          environ = None
      try:
          c = subprocess.Popen(
              '{} "{}"'.format(editor, filename),
              env=environ,
              shell=True,
          )
          exit_code = c.wait()
          if exit_code != 0:
              raise ClickException("{}: Editing failed!".format(editor))
      except OSError as e:
          raise ClickException(
              "{}: Editing failed: {}".format(editor, e)
          )
  
imports: import contextlib
  import math
  import os
  import sys
  import time
  from ._compat import _default_text_stdout
  from ._compat import CYGWIN
  from ._compat import get_best_encoding
  from ._compat import int_types
  from ._compat import isatty
  from ._compat import open_stream
  from ._compat import range_type
  from ._compat import strip_ansi
  from ._compat import term_len
  from ._compat import WIN
  from .exceptions import ClickException
  from .utils import echo
label_desc: Use image node_id 3 for calling the Editor obj's underlying member method code with example usage: obj.edit_file(filename) without return types