text: import os
  import warnings
  
  from numba.core import errors
  
  
  def get_numbapro_envvar(envvar, default=None):
      # use vanilla get here so as to use `None` as a signal for not-set
      value = os.environ.get(envvar)
      if value is not None:
          url = ("https://numba.pydata.org/numba-doc/latest/cuda/overview.html",
                 "#cudatoolkit-lookup")
          msg = ("\nEnvironment variables with the 'NUMBAPRO' prefix are "
                 "deprecated and consequently ignored, found use of %s=%s.\n\n"
                 "For more information about alternatives visit: %s"
                 % (envvar, value, url))
          warnings.warn(errors.NumbaWarning(msg))
      return default
  
  
  def get_numba_envvar(envvar, default=None):
      """Tries to load an environment variable with numba ``PREFIX + envvar``.
      Only the "NUMBA_" prefix is attempted for use herein. The use of the
      "NUMBAPRO_" prefix was deprecated in 0.45 with support removed in 0.46.
      However it is still checked solely to warn users that it has no effect.
      """
      assert not envvar.startswith('NUMBA')
      value = os.environ.get('NUMBA_' + envvar)
      if value is None:
          return get_numbapro_envvar('NUMBAPRO_' + envvar, default=default)
      else:
          return value
  