Create lazy_init.py

lazy_init.py

@@ -0,0 +1,33 @@
+# -*- coding: utf-8 -*-
+# @Time    : 2021/5/24 16:21
+# @Author  : LinMD
+# @File    : lazy_init.py
+# @Descip  :
+class LazyProxy:
+    def __init__(self, cls, *args, **kwargs):
+        print("INIT PROXY")
+        self.__dict__['_cls'] = cls
+        self.__dict__['_params'] = args
+        self.__dict__['_kwargs'] = kwargs
+        self.__dict__['_obj'] = None
+
+    def __getattr__(self, item):
+        if self.__dict__['_obj'] is None:
+            self._init_obj()
+        return getattr(self.__dict__['_obj'], item)
+
+    def __setattr__(self, key, value):
+        if self.__dict__['_obj'] is None:
+            self._init_obj()
+        setattr(self.__dict__['_obj'], key, value)
+
+    def _init_obj(self):
+        self.__dict__['_obj'] = object.__new__(self.__dict__['_cls'])
+        self.__dict__['_obj'].__init__(*self.__dict__['_params'], **self.__dict__['_kwargs'])
+
+
+class LazyInit:
+    """需要实现懒加载的类，继承该类"""
+
+    def __new__(cls, *args, **kwargs):
+        return LazyProxy(cls, *args, **kwargs)