官方文档： https://docs.python.org/3/reference/datamodel.html#special-method-names
中文： https://docs.python.org/zh-cn/3/reference/datamodel.html#special-method-names
__get__
class aa():
def __get__(self):
return self.name
class bb():
def __init__(self):
self.ca=aa()
b=bb()
print(b.ca)
output:
<__main__.aa object at 0x7e3992d570>