djiango 写完model 在makemigrantions时候报错

Question

Traceback (most recent call last):
  File "/home/wukaihua/下载/pycharm-2017.1/helpers/pycharm/django_manage.py", line 43, in <module>
    run_module(manage_file, None, '__main__', True)
  File "/home/wukaihua/.pyenv/versions/2.7.3/lib/python2.7/runpy.py", line 176, in run_module
    fname, loader, pkg_name)
  File "/home/wukaihua/.pyenv/versions/2.7.3/lib/python2.7/runpy.py", line 82, in _run_module_code
    mod_name, mod_fname, mod_loader, pkg_name)
  File "/home/wukaihua/.pyenv/versions/2.7.3/lib/python2.7/runpy.py", line 72, in _run_code
    exec code in run_globals
  File "/home/wukaihua/PycharmProjects/MoocText/manage.py", line 22, in <module>
    execute_from_command_line(sys.argv)
  File "/home/wukaihua/.pyenv/versions/mooc/lib/python2.7/site-packages/django/core/management/__init__.py", line 363, in execute_from_command_line
    utility.execute()