Function IsAttrsHelper

tensorflow/python/util/util.cc:236–248

Returns 1 if `o` is an instance of attrs-decorated class. Returns 0 otherwise.

// Returns 1 if `o` is an instance of attrs-decorated class.
// Returns 0 otherwise.
int IsAttrsHelper(PyObject* o) {
  static auto* const check_cache = new CachedTypeCheck([](PyObject* to_check) {
    Safe_PyObjectPtr cls(PyObject_GetAttrString(to_check, "__class__"));
    if (cls) {
      return PyObject_HasAttrString(cls.get(), "__attrs_attrs__");
    }

    // PyObject_GetAttrString returns null on error
    PyErr_Clear();
    return 0;
  });
  return check_cache->CachedLookup(o);
}

// Returns 1 if `o` is an object of type IndexedSlices.
// Returns 0 otherwise.