Re: [web2py] Re: Why can't i iterate over functions and print on view

[Maurice Waka]

Thanks Anthony.
Am trying to import modules to the controller then run the functions
imported from a list (r_lst). From here the several functions will print
out different messages to view depending on user input.
On Jun 1, 2016 8:41 PM, "Anthony"  wrote:

> No idea what you're trying to do here, but note that web2py executes a
> view only if the controller function returns a dictionary. You haven't
> shown all of your code, but it isn't clear you are returning a dictionary
> (with "result" as one of the keys).
>
> Anthony
>
> On Wednesday, June 1, 2016 at 12:48:41 PM UTC-4, Maurice Waka wrote:
>>
>> I have part of the code here as follows:
>> r_lst = [foo(), foo1(), foo2(), foo3()]
>> class Filters(object):
>> @staticmethod
>> def Search_item():
>> it = iter(r_lst)
>> while True:
>> try:
>> for i in range(len(r_lst)):
>> it.next
>> except stopIteration:
>> break
>> c = Filters.Search_item()
>> p = Filters
>> List_func = c
>> def Do_print():
>> for stuff in dir(p):
>> if 'Filter' in stuff:
>> if List_func:
>> return List_func
>> result = Do_print()
>> On view I have this:
>>
>> code.
>>
>> {{=XML(''.join(list(result)))}}{{break}}
>>
>> N/B
>> When I do this on Idle, it works well by printing out the result such as
>> def foo():
>> print 'Hello World'...###Hello world is stored in a sqlite DB .I use
>> 'return' instead of print function when using web2py
>> when I run this code on web2py, I just get a blank page. Where could i be
>> going wrong?
>> Regards
>>
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Re: [web2py] Re: Why can't i iterate over functions and print on view

[Maurice Waka]

Hi.  Am not a professional python programmer so please bear with my crude
code.
On Jun 1, 2016 8:10 PM, "Leonel Câmara"  wrote:

What are you trying to do exactly? That code is an unreadable mess.

The reason you're getting a blank page is that you only return if 'Filter'
in stuff, since "stuff" is just one of the things you get when you run dir
on class Filters (you have p=Filters and then you do dir(p)), and since
that class has nothing with a "Filter" in its name on its __dict__ that is
never true.

Are you trying to program by coincidence
 or
something?

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Re: [web2py] Re: Why can't i iterate over functions and print on view

[Maurice Waka]

I can see your point though.  And the input from Anthony. Let me work on
the code again and try return a dict. The code is very long that's why I
only took  a snippet
On Jun 1, 2016 8:10 PM, "Leonel Câmara"  wrote:

What are you trying to do exactly? That code is an unreadable mess.

The reason you're getting a blank page is that you only return if 'Filter'
in stuff, since "stuff" is just one of the things you get when you run dir
on class Filters (you have p=Filters and then you do dir(p)), and since
that class has nothing with a "Filter" in its name on its __dict__ that is
never true.

Are you trying to program by coincidence
 or
something?

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Re: [web2py] Re: Why can't i iterate over functions and print on view

[Dave S]

On Wednesday, June 1, 2016 at 11:33:47 AM UTC-7, Maurice Waka wrote:
>
> Thanks Anthony. 
> Am trying to import modules to the controller then run the functions 
> imported from a list (r_lst). From here the several functions will print 
> out different messages to view depending on user input.
>

I'm not sure that I understand.  Do you mean the user input results in a 
request to 
//mydomain.com/myapplication/mycontroller/myfunction?arg1&arg2
and that you're supposed to do different things according to the values of 
arg1 and arg2?  If that's the case, myfunction() should probably just use 
regular if-statements.  The branches of the if-statement can invoke 
imported functions in the normal python way

import datetime
def myfunction():
   if "snooze" in request.args[0]:
  result = "Please rest until %s" % (request.now.timedelta(minutes=10).
isoformat())
   return dict(result = result)


If you want the print actions to happen without sending an [additional] 
request to the server, that's a different story.  Note that you normally 
can't run Python code in the browser, so returning Python to the browser 
doesn't have much value.  You need to have Javascript functions in place of 
the Python functions.  Python *does* run in the view, but that happens on 
the server, and can't respond to user input until that input is turned into 
a request.

If you mean something else, then you'll have to try again to explain what 
you want to do.

Dave
/dps



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Re: [web2py] Re: Why can't i iterate over functions and print on view

[Anthony]

On Wednesday, June 1, 2016 at 2:35:18 PM UTC-4, Maurice Waka wrote:
>
> Hi.  Am not a professional python programmer so please bear with my crude 
> code. 
>

It's not that the code is crude so much as it is insanely complicated if 
all you want to do is call a list of functions and get a list of their 
results. Unless there's something much more sophisticated going on in the 
rest of the code, I don't know how you would have stumbled upon this 
particular implementation.

Anthony

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