Let us look at pyson expresson:
If(~Eval('end_date', None)What is ~? Experimenting with Python interpreter, ~True is -2 and ~False is -1. I thought ~ is for negation, but -1 and -2 are not boolean values even in C they are 0 or >0. -- You received this message because you are subscribed to the Google Groups "tryton" group. To view this discussion on the web visit https://groups.google.com/d/msgid/tryton/b0d6996a-a6da-48c2-8d80-ec1f3f3c8511%40googlegroups.com.
