except: 和except Exception as e 之间的区别: [英] Difference between except: and except Exception as e:
问题描述
以下两个代码片段都做同样的事情.它们捕获每个异常并执行 except:
块
片段 1 -
尝试:#一些可能抛出异常的代码除了:#异常处理代码
片段 2 -
尝试:#一些可能抛出异常的代码除了作为 e 的例外:#异常处理代码
这两种结构到底有什么区别?
第二个可以访问异常对象的属性:
<预><代码>>>>定义捕捉():... 尝试:... asd()... 除了 e 的异常:... 打印 e.message, e.args...>>>抓住()全局名称 'asd' 未定义(全局名称 'asd' 未定义",)但它不会捕获BaseException
或系统退出异常SystemExit
、KeyboardInterrupt
和GeneratorExit
:
裸机除外:
<预><代码>>>>定义捕捉():... 尝试:...引发 BaseException()... 除了:... 经过...>>>抓住()>>>请参阅文档的内置异常部分和
Both the following snippets of code do the same thing. They catch every exception and execute the code in the except:
block
Snippet 1 -
try:
#some code that may throw an exception
except:
#exception handling code
Snippet 2 -
try:
#some code that may throw an exception
except Exception as e:
#exception handling code
What is exactly the difference in both the constructs?
In the second you can access the attributes of the exception object:
>>> def catch():
... try:
... asd()
... except Exception as e:
... print e.message, e.args
...
>>> catch()
global name 'asd' is not defined ("global name 'asd' is not defined",)
But it doesn't catch BaseException
or the system-exiting exceptions SystemExit
, KeyboardInterrupt
and GeneratorExit
:
>>> def catch():
... try:
... raise BaseException()
... except Exception as e:
... print e.message, e.args
...
>>> catch()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "<stdin>", line 3, in catch
BaseException
Which a bare except does:
>>> def catch():
... try:
... raise BaseException()
... except:
... pass
...
>>> catch()
>>>
See the Built-in Exceptions section of the docs and the Errors and Exceptions section of the tutorial for more info.
这篇关于except: 和except Exception as e 之间的区别:的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!