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动态替换模型的少量filed或method
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class ModelWrapper(object): | |
""" | |
在原始模型之外进行一层外包封装。 | |
动态地替换原模型的属性。 | |
""" | |
def __init__(self, execute_model): | |
self.execute_model = execute_model # 实际运行的模型 | |
self.overwrite_model_attr() | |
def overwrite_model_attr(self): | |
"""模型优先使用wrapper模型的方法""" | |
attr_names = [attr_name for attr_name in dir(self) | |
if not attr_name.startswith("__")] | |
# print(attr_names) | |
for attr_name in attr_names: | |
if hasattr(self.execute_model, attr_name): | |
print(f"overwrite {attr_name} for original model {self.execute_model}") | |
setattr(self.execute_model, attr_name, getattr(self, attr_name)) | |
def __getattr__(self, item): | |
"""若wrapper没有覆盖某属性,使用原模型的属性""" | |
if hasattr(self.execute_model, item): | |
return getattr(self.execute_model, item) | |
else: | |
raise AttributeError(f"{self} has not attribute {item} !") |
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