def acc_check(expected, got, rel_err=2e-15, abs_err=5e-323):
 if (math.isinf(expected) and (got == expected)):
  return None
 error = (got - expected)
 permitted_error = max(abs_err, (rel_err * abs(expected)))
 if (abs(error) < permitted_error):
  return None
 return 'error = {}; permitted error = {}'.format(error, permitted_error)

def acc_check ( expected , got , rel_err = 2e-15 , abs_err = 5e-323 ) : if ( math . isinf ( expected ) and ( got == expected ) ) : return None error = ( got - expected ) permitted_error = max ( abs_err , ( rel_err * abs ( expected ) ) ) if ( abs ( error ) < permitted_error ) : return None return 'error = {}; permitted error = {}' . format ( error , permitted_error )
determine whether non-nan floats a and b are equal to within a rounding error .