The rendering view ends with ExpressionError: invalid syntax. I use following expression tal:define="result python: test(is_any, [], [1])". Is a change in Plone 5? This was working in Plone 3.
tal:define="result python: test(is_any, [], [1])"
Use
condition and trueexpr or falseexpr
Or
trueexpr if condition else falseexpr
As you would do it in Python
-aj
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