Chris Angelico <[email protected]> writes:
> for instance, I might have a socket object, and I might not, so I can
> use "if not self.socket: self.connect()" ...
This sounds like you want a Maybe or Option object.
Marko's suggestion
rv = f()
if rv is not None:
return rv
rv = g()
if rv is not None:
return rv
return h()
seems unspeakably ugly. Rather than None on failure maybe f()
and g() could return an empty list on failure, or a one-element list
containing the item on success. That uses lists to simulate a Maybe type.
Then the above could go (Python 3, untested):
def tries():
yield from f()
yield from g()
yield [h()]
return tries().next()
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