flyaflya wrote:
>
> >>> a = {1: ("a")}
> >>> a[1]
> 'a'
> why not ('a')? when
> >>> a = {1: ((("a")))}
> >>> a[1]
> 'a'
> the result is 'a' too,not ((("a"))).but when use["a"] or ("a","b"),the
> tuple is longer than 1, it's no problem.
>
>
>
To define a tuple literal with one member, you must place a comma
after the first element like this:
a = {1: ("a",)}
I read this somewhere in the python docs, so I know its there
somewhere.
The comma eliminates ambiguity as to the meaning of the brackets,
which without the comma are simply enclosing and precedence
controlling brackets.
Steve
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