code: def clean_environment():
      # Remove PYTHON* environment variables such as PYTHONHOME
      return {
          name: value
          for name, value in os.environ.items()
          if not name.startswith("PYTHON")
      }
  
file_path: cpython/Lib/test/test_gdb/util.py
imports: import os
  import re
  import shlex
  import shutil
  import subprocess
  import sys
  import sysconfig
  import unittest
  from test import support
label_desc: Use image node_id 1 for calling a global function with example usage: clean_environment() and returns: unknown