> Error message #3 >> >> No error message - this overwrites cumulative amount to the amount >> entered by the user, no memory. >> > > Python doesn't have the increment assignment operator, so number 3 is > being taken as > > cumulative_amount = NULL + form.vars.amount > > Python does allow increment assignments, though it is "+=" rather than "=+". Perhaps you meant that it cannot be used when passing function arguments, as in this case (i.e., you can't do myfunc(arg+=some_value), which obviously wouldn't make sense, as "arg" doesn't have any value to increment). Anthony
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