code: def _length_hint(obj):
      """Returns the length hint of an object."""
      try:
          return len(obj)
      except (AttributeError, TypeError):
          try:
              get_hint = type(obj).__length_hint__
          except AttributeError:
              return None
          try:
              hint = get_hint(obj)
          except TypeError:
              return None
          if (
              hint is NotImplemented
              or not isinstance(hint, int_types)
              or hint < 0
          ):
              return None
          return hint
  
imports: import contextlib
  import math
  import os
  import sys
  import time
  from ._compat import _default_text_stdout
  from ._compat import CYGWIN
  from ._compat import get_best_encoding
  from ._compat import int_types
  from ._compat import isatty
  from ._compat import open_stream
  from ._compat import range_type
  from ._compat import strip_ansi
  from ._compat import term_len
  from ._compat import WIN
  from .exceptions import ClickException
  from .utils import echo
label_desc: Use image node_id 1 for calling a global function with example usage: _length_hint(obj) and returns: len, hint, None, None, None