def _mergeBlock(self, first, last):
        '''
        merge a block of lines. Helper for merge.
        '''
        lineNumber = first
        while lineNumber < last:
            self.currentLine = lineNumber
            instruction, args, lineNumber = self._compiledLines[lineNumber]
            self.blockDispatch[instruction](args)   # this will call '_execute' or '_mergeLine'

        merge a block of lines. Helper for merge.
        
recipes/Python/465508_Yaptoo_Yaptu_outrageously_obfuscated__or_yet/recipe-465508.py