code: def _importers():
      # import things we need
      # but make this done on a first use basis
  
      global _IMPORTS
      if _IMPORTS:
          return
  
      global _HAS_BS4, _HAS_LXML, _HAS_HTML5LIB
  
      try:
          import bs4  # noqa
  
          _HAS_BS4 = True
      except ImportError:
          pass
  
      try:
          import lxml  # noqa
  
          _HAS_LXML = True
      except ImportError:
          pass
  
      try:
          import html5lib  # noqa
  
          _HAS_HTML5LIB = True
      except ImportError:
          pass
  
      _IMPORTS = True
  
imports: from distutils.version import LooseVersion
  import numbers
  import os
  import re
  import pandas.compat
  from pandas.compat import binary_type, iteritems, lmap, lrange, raise_with_traceback, string_types, u
  from pandas.errors import AbstractMethodError, EmptyDataError
  from pandas.core.dtypes.common import is_list_like
  from pandas import Series
  from pandas.io.common import _is_url, _validate_header_arg, urlopen
  from pandas.io.formats.printing import pprint_thing
  from pandas.io.parsers import TextParser
label_desc: Use image node_id 1 for calling a global function with example usage: _importers() without return types