Robert Kern wrote:
Steven Bethard wrote:
Sorry, I also meant to add that the other obvious way of dealing with
this kind of thing is to make the results keyword parameters:
def get_connection(GOOD=1, BAD_AUTH=2, NO_SERVER=3):
if tcp_conn():
if server_allows_conn():
return GOOD
else:
return BAD_AUTH
else:
return NO_SERVER
This has the benefit that if your user wants different return values
they can specify them, but the disadvantage that someone improperly
calling the function with more than 0 parameters will get, instead of
an error message, a strange return value.
Another disadvantage is that one must compare the return value by value
and not by name. That is, I cannot do something like this:
code = get_connection()
if code == NO_SERVER:
...
Good point. The class-type implementation does allow you to do this:
>>> class get_connection(object):
... GOOD = 1
... BAD_AUTH = 2
... NO_SERVER = 3
... def __new__(cls):
... if tcp_conn():
... if server_allows_conn():
... return cls.GOOD
... else:
... return cls.BAD_AUTH
... else:
... return cls.NO_SERVER
...
>>> get_connection.GOOD
1
>>> get_connection.BAD_AUTH
2
>>> get_connection.NO_SERVER
3
Steve
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