exceptions.UnicodeDecodeError: 'ascii' codec can't decode by

2014-07-06 10:56:59+0200 [google-DE] ERROR: Error processing {'city': 'Calwer Str.\xc2\xa0772076\xc2\xa0T\xc3\xbcbingen'}
        Traceback (most recent call last):
          File "C:\Python27\lib\site-packages\scrapy-0.18.4-py2.7.egg\scrapy\middleware.py", line 62, in _process_chain
            return process_chain(self.methods[methodname], obj, *args)
          File "C:\Python27\lib\site-packages\scrapy-0.18.4-py2.7.egg\scrapy\utils\defer.py", line 65, in process_chain
            d.callback(input)
          File "C:\Python27\lib\site-packages\twisted\internet\defer.py", line 382, in callback
            self._startRunCallbacks(result)
          File "C:\Python27\lib\site-packages\twisted\internet\defer.py", line 490, in _startRunCallbacks
            self._runCallbacks()
        --- <exception caught here> ---
          File "C:\Python27\lib\site-packages\twisted\internet\defer.py", line 577, in _runCallbacks
            current.result = callback(current.result, *args, **kw)
          File "DEpost\pipelines.py", line 25, in process_item
            self.modelsCsv.writerow([item['city']])
          File "C:\Python27\lib\codecs.py", line 691, in write
            return self.writer.write(data)
          File "C:\Python27\lib\codecs.py", line 351, in write
            data, consumed = self.encode(object, self.errors)
        exceptions.UnicodeDecodeError: 'ascii' codec can't decode byte 0xc2 in position 11: ordinal not in range(128)