starred expression with tuple or array !? differente behaviour!

[António Ramos]

Hello i have my code to generate html base on a condition

one of the table columns should be created only if var =1 

this works but the html removes the _class="aa" in case of var==1, and does not create the TD if var!=1

TD(

...,

*(DIV("b",_class="aa") ) if var==1 else tuple())

....,

etc

Using a list

If i use a list it shows the _class="aa" in case of var==1 but how do i make it to ommit the column in case var!=1 ??

It creates a blank TD() and that is not what i want 

TD(*[DIV("b",_class="aa") if var==1 else None???])

regards

António

[Jim S]

Did you see my reply in the py4web group?

--------------------------

If I'm understanding the question correctly, I think I'd do the following:

cell_list = []

cell_list.append(TD("...first td here..."))

cell_list.append(TD("...additional cell..."))

cell_list.append(TD("...additional cell..."))

if var == 1:

   cell_list.append('my conditional cell')

cell_list.append(TD("...remaining cells..."))

cell_list.append(TD("...remaining cells..."))

cell_list.append(TD("...remaining cells..."))

Or, if you want to specify all the standard cells at one time...

cell_list = [TD(), TD(), TD(), TD(), TD())

if var == 1:

    cell_list.insert(3, TD('conditional cell'))

Does that help?

-Jim