def compute(self):
        result = "".join(self.force_get_input(i % 'str%d', '')
                         for i in xrange(1, 1 + self.fieldCount))
        self.set_output('value', result)

##############################################################################
dataset/ETHPy150Open VisTrails/VisTrails/vistrails/core/modules/basic_modules.py/ConcatenateString.compute/swapped operands of `%`