code: def _expand_user(filepath_or_buffer):
      """Return the argument with an initial component of ~ or ~user
         replaced by that user's home directory.
  
      Parameters
      ----------
      filepath_or_buffer : object to be converted if possible
  
      Returns
      -------
      expanded_filepath_or_buffer : an expanded filepath or the
                                    input if not expandable
      """
      if isinstance(filepath_or_buffer, string_types):
          return os.path.expanduser(filepath_or_buffer)
      return filepath_or_buffer
  
imports: import codecs
  from contextlib import closing, contextmanager
  import csv
  import mmap
  import os
  import zipfile
  import pandas.compat
  from pandas.compat import BytesIO, StringIO, string_types, text_type
  from pandas.errors import AbstractMethodError, DtypeWarning, EmptyDataError, ParserError, ParserWarning
  from pandas.core.dtypes.common import is_file_like, is_number
  from pandas.io.formats.printing import pprint_thing
label_desc: Use image node_id 2 for calling a global function with example usage: _expand_user(filepath_or_buffer) and returns: filepath_or_buffer, os