code: def parse_file(
      filename, use_cpp=False, cpp_path="cpp", cpp_args="", parser=None
  ):
      """Parse a C file using pycparser.
  
      filename:
          Name of the file you want to parse.
  
      use_cpp:
          Set to True if you want to execute the C pre-processor
          on the file prior to parsing it.
  
      cpp_path:
          If use_cpp is True, this is the path to 'cpp' on your
          system. If no path is provided, it attempts to just
          execute 'cpp', so it must be in your PATH.
  
      cpp_args:
          If use_cpp is True, set this to the command line arguments strings
          to cpp. Be careful with quotes - it's best to pass a raw string
          (r'') here. For example:
          r'-I../utils/fake_libc_include'
          If several arguments are required, pass a list of strings.
  
      parser:
          Optional parser object to be used instead of the default CParser
  
      When successful, an AST is returned. ParseError can be
      thrown if the file doesn't parse successfully.
  
      Errors from cpp will be printed out.
      """
      if use_cpp:
          text = preprocess_file(filename, cpp_path, cpp_args)
      else:
          with io.open(filename) as f:
              text = f.read()
  
      if parser is None:
          parser = CParser()
      return parser.parse(text, filename)
  
imports: import io
  from subprocess import check_output
  from .c_parser import CParser
label_desc: Use image node_id 2 for calling a global function with example usage: parse_file(filename, use_cpp, cpp_path, cpp_args, parser) and returns: parser