Veek M <v...@dont-use-this.com> writes:
> The docs state that a expression is some combination of value, operator,
> variable and function. Also you cannot add or combine a generator
> expression with a value as you would do with 2 + 3 + 4. For example,
> someone on IRC suggested this
> all(a == 'a' for a in 'apple') but
>
> 1. all is a function/method
> 2. so (whatever) in this case is a call but obviously it works so it must
> be a generator object as well.. so.. how does 'all' the function object
> work with the generator object that's being produced?
>
> I can't for example do min 1,2,3 but i can do min (1,2,3) and the () are
> not integral to a tuple - therefore one could argue that the () are part
> of the call - not so with a generator Expression where the () are
> integral to its existence as an object.
>
> Could someone clarify further.
The Language Reference Manual says:
generator_expression ::= "(" expression comp_for ")"
The parentheses can be omitted on calls with only one argument. See
section Calls for details.
Calls:
call ::= primary "(" [argument_list [","] | comprehension] ")"
comprehension ::= expression comp_for
The last part is the inner part (i.e. without the parentheses) of
generator_expression.
--
Pieter van Oostrum
www: http://pieter.vanoostrum.org/
PGP key: [8DAE142BE17999C4]
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