Use django helper to import variants

payments/core.py

@@ -1,7 +1,6 @@
 from __future__ import annotations
 
 import re
-from importlib import import_module
 from typing import TYPE_CHECKING
 from urllib.parse import urlencode
 from urllib.parse import urljoin
@@ -167,9 +166,7 @@ def _default_provider_factory(variant: str, payment: BasePayment | None = None):
  if not handler:
  raise ValueError(f"Payment variant does not exist: {variant}")
  if variant not in PROVIDER_CACHE:
- module_path, class_name = handler.rsplit(".", 1)
- module = import_module(module_path)
- class_ = getattr(module, class_name)
+ class_ = import_string(handler)
  PROVIDER_CACHE[variant] = class_(**config)
  return PROVIDER_CACHE[variant]