<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _convert_to_display(self, data):
 """From 'Column_x0020_Title' to 'Column Title'"""

        for _dict in data:
            keys = list(_dict.keys())[:]
            for key in keys:
                if key not in self._sp_cols:
                    raise Exception(key + ' not a column in current List.')
                _dict[self._sp_cols[key]['name']] = self._python_type(key, _dict.pop(key))