擅长:python、mysql、java
<p>一个相当幼稚的全局映射解决方案似乎也在工作:</p>
<pre><code>m = {}
class MetaError(type):
def __init__(cls, name, bases, attrs):
for base in bases:
m[(base, name)] = cls
super(MetaError, cls).__init__(name, bases, attrs)
def __getattribute__(self, value):
if (self, value) in m:
return m[self, value]
return type.__getattribute__(self, value)
class BaseError(Exception):
__metaclass__ = MetaError
class HttpError(BaseError):
pass
class HttpBadRequest(HttpError):
pass
class HttpNotFound(HttpError):
pass
class FileNotFound(HttpNotFound):
pass
class InvalidJson(HttpBadRequest):
pass
</code></pre>