Re: [web2py] Re: differntial of request.args[0] and request.args(0)

[Stifan Kristi]

a, i'm understand right now, thank you so much for your detail explaination
all.


On Mon, May 16, 2011 at 12:51 AM, pbreit  wrote:

> Just remember that the () method is unique to Web2py "strorage" objects and
> cannot be used generally in Python.
>
> Same for request.vars (web2py) vs. request['vars'] (python).
>
> http://web2py.com/book/default/chapter/04#request
>
> Is that correct everyone?
>

Re: [web2py] Re: differntial of request.args[0] and request.args(0)

[Jason Brower]

That is correct, except it really is python that Massimo has done here.  
It's a convenience method that he has created for this very issue as it 
happens a lot.


On 05/15/2011 08:51 PM, pbreit wrote:
Just remember that the () method is unique to Web2py "strorage" 
objects and cannot be used generally in Python.


Same for request.vars (web2py) vs. request['vars'] (python).

http://web2py.com/book/default/chapter/04#request

Is that correct everyone?

Re: [web2py] Re: differntial of request.args[0] and request.args(0)

[pbreit]

Just remember that the () method is unique to Web2py "strorage" objects and 
cannot be used generally in Python.

Same for request.vars (web2py) vs. request['vars'] (python).

http://web2py.com/book/default/chapter/04#request

Is that correct everyone?

Re: [web2py] Re: differntial of request.args[0] and request.args(0)

[Stifan Kristi]

i'm understand right now, thank you so much for your detail explaination ron

On Sun, May 15, 2011 at 2:08 PM, ron_m  wrote:

> In the core chapter of the book I found this:
>
> In the above example, both request.args[i] and request.args(i) can be used
> to retrieve the i-th element of the request.args, but while the former
> raises an exception if the list does not have such an index, the latter
> returns None in this case.
>
> I would use request.args(0) and test for None if it is legal for the arg to
> not to be there on some requests. Conversely, if arg 0 is always supposed to
> be part of the request then request.args[0] would generate an exception and
> a ticket indicating a failure condition when it is missing.
>
>

[web2py] Re: differntial of request.args[0] and request.args(0)

[ron_m]

In the core chapter of the book I found this:

In the above example, both request.args[i] and request.args(i) can be used 
to retrieve the i-th element of the request.args, but while the former 
raises an exception if the list does not have such an index, the latter 
returns None in this case.

I would use request.args(0) and test for None if it is legal for the arg to 
not to be there on some requests. Conversely, if arg 0 is always supposed to 
be part of the request then request.args[0] would generate an exception and 
a ticket indicating a failure condition when it is missing.