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()