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

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