python2.6 pip install gittle 安装报错

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Running setup.py install for gittle
SyntaxError: ('invalid syntax', ('/usr/lib/python2.6/site-packages/gittle/utils/git.py', 243, 11, ' for oldkey, newkey in key_pairs\n'))

SyntaxError: ('invalid syntax', ('/usr/lib/python2.6/site-packages/gittle/auth.py', 86, 15, '            for key in self.KWARG_KEYS\n'))

SyntaxError: ('invalid syntax', ('/usr/lib/python2.6/site-packages/gittle/gittle.py', 677, 15, '            for state, paths in files.items()\n'))



求解~