def compute(self):
        n = self.get_name()
        if (self.has_input("create_file") and self.get_input("create_file")):
            vistrails.core.system.touch(n)
        if not os.path.isfile(n):
            raise ModuleError(self, n % 'File %r does not exist')
        self.set_results(n)
        self.set_output("local_filename", n)
dataset/ETHPy150Open VisTrails/VisTrails/vistrails/core/modules/basic_modules.py/File.compute/swapped operands of `%`