Catching very specific exceptions

[Peter Hansen]

Alex Martelli wrote:
> what I've done in such situations is
> 
> except socket.error, e:
>   if e.errno == 10061:
>      ...
>   elif e.errno == 10060:
>      ...
>   else:
>     raise
> 
> Not sure the code in a socket.error has attributename 'errno', but I
> hope you get the general idea.

If it does not, or as a more generally applicable solution (though less 
readable), one can use the args attribute:

except socket.error, e:
    if e.args[0] == 10061:
       ...
    elif e.args[0] == 10060:
       ...

args is just the tuple formed from the positional arguments passed to 
the __init__() of the exception object when it is created, as if you did:

class Exception:
    def __init__(self, *args):
       self.args = args


-Peter