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btiffin

Thu Apr 09, 2009 7:18 pm


Generator; request for opinions

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Hey gang.

If you were writing a Python generator function would you end it with a StopIteration exception

def genny():
    if somestuff:
        stillstuff = True
        stuff = firststuff
    while stillstuff:
        yield stuff
        stuff = dostuff
        stillstuff = True if morestuff else False
    raise StopIteration

or just let the def fall out of scope and get the implied exception?

I convinced the team to use the explicit raise today, but I'm not sure if I was being to pricky.

Cheers


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Zeroth

Thu Apr 09, 2009 9:55 pm


Re: Generator; request for opinions

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>>> import this
The Zen of Python, by Tim Peters

Beautiful is better than ugly.
Explicit is better than implicit.
Simple is better than complex.
Complex is better than complicated.
Flat is better than nested.
Sparse is better than dense.
Readability counts.
Special cases aren't special enough to break the rules.
Although practicality beats purity.
Errors should never pass silently.
Unless explicitly silenced.
In the face of ambiguity, refuse the temptation to guess.
There should be one-- and preferably only one --obvious way to do it.
Although that way may not be obvious at first unless you're Dutch.
Now is better than never.
Although never is often better than *right* now.
If the implementation is hard to explain, it's a bad idea.
If the implementation is easy to explain, it may be a good idea.
Namespaces are one honking great idea -- let's do more of those!



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btiffin

Sat Apr 11, 2009 11:20 am


RE:Generator; request for opinions

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This is one of those
[code]01 ditto constant as 'yeah I agree and thanks for the confirmation Zeroth'.[/code]
posts.

Cheers


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Zeroth

Sat Apr 11, 2009 12:32 pm


Re: Generator; request for opinions

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Eh, whenever I need to make a choice like yours, I tend to check that guide, see what it says. It almost always has an answer for me.