On Sunday, April 10, 2016 at 8:48:49 PM UTC-4, Fillmore wrote:
> On 04/10/2016 08:31 PM, Ben Finney wrote:
> > Can you describe explicitly what that "discontinuation point" is? I'm
> > not seeing it.
>
> Here you go:
>
> >>> a = '"string1"'
> >>> b = '"string1","string2"'
> >>> c = '"string1","string2","string3"'
> >>> ea = eval(a)
> >>> eb = eval(b)
> >>> ec = eval(c)
> >>> type(ea)
> <class 'str'> <--- HERE !!!!
> >>> type(eb)
> <class 'tuple'>
> >>> type(ec)
> <class 'tuple'>
>
> I can tell you that it exists because it bit me in the butt today...
>
> and mind you, I am not saying that this is wrong. I'm just saying that it
> surprised me.
Perhaps the extra complication of eval is confusing things. This:
>>> a = '"string1"'
>>> ea = eval(a)
>>> type(ea)
<class 'str'>
is the same as:
>>> type("string1")
<class 'str'>
Does that surprise you? "string1" sure looks like a plain-old string to
me, I'm not sure why you would think it would be a tuple.
Your three expressions are:
ea = "string1"
eb = "string1","string2"
ec = "string1","string2","string3"
ea is a string, eb is a two-element tuple (both elements are strings),
and ec is a three-element tuple (all elements are strings).
As others have said, commas make tuples. Your first expression has no
commas (and no parens!) so it is not a tuple.
--Ned.
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