text: from distutils.version import LooseVersion
  import warnings
  
  _NUMEXPR_INSTALLED = False
  _MIN_NUMEXPR_VERSION = "2.6.1"
  
  try:
      import numexpr as ne
      ver = LooseVersion(ne.__version__)
      _NUMEXPR_INSTALLED = ver >= LooseVersion(_MIN_NUMEXPR_VERSION)
  
      if not _NUMEXPR_INSTALLED:
          warnings.warn(
              "The installed version of numexpr {ver} is not supported "
              "in pandas and will be not be used\nThe minimum supported "
              "version is {min_ver}\n".format(
                  ver=ver, min_ver=_MIN_NUMEXPR_VERSION), UserWarning)
  
  except ImportError:  # pragma: no cover
      pass
  
  __all__ = ['_NUMEXPR_INSTALLED']
  