code: def __init__(self, filename, mode="r"):
      assert "r" in mode, ("Read-only", mode)
      self.filename = filename
      self.mode = mode
      self.file = None
      self.build_root = os.environ.get(
          "PYTHON_COVERAGE_CYTHON_BUILD_ROOT"
      )
  
imports: from __future__ import absolute_import
  import re
  import os.path
  import sys
  from collections import defaultdict
  from coverage.plugin import CoveragePlugin, FileTracer, FileReporter
  from coverage.files import canonical_filename
  from .Utils import find_root_package_dir, is_package_dir, open_source_file
  from .None import __version__
label_desc: Use image node_id 1 to create a new OpenFile object from inherited base classes: object with example: obj = OpenFile(filename, mode)