RuntimeError: Python is not installed as a framework. The Mac OS X backend will not be able to funct

Traceback (most recent call last):
  File "/Users/user/PycharmProjects/datastructure/jianyan.py", line 3, in <module>
    import matplotlib.pyplot as plt  
  File "/Users/user/PycharmProjects/untitled1/venv/lib/python2.7/site-packages/matplotlib/pyplot.py", line 115, in <module>
    _backend_mod, new_figure_manager, draw_if_interactive, _show = pylab_setup()
  File "/Users/user/PycharmProjects/untitled1/venv/lib/python2.7/site-packages/matplotlib/backends/__init__.py", line 63, in pylab_setup
    [backend_name], 0)
  File "/Users/user/PycharmProjects/untitled1/venv/lib/python2.7/site-packages/matplotlib/backends/backend_macosx.py", line 17, in <module>
    from matplotlib.backends import _macosx
RuntimeError: Python is not installed as a framework. The Mac OS X backend will not be able to function correctly if Python is not installed as a framework. See the Python documentation for more information on installing Python as a framework on Mac OS X. Please either reinstall Python as a framework, or try one of the other backends. If you are using (Ana)Conda please install python.app and replace the use of 'python' with 'pythonw'. See 'Working with Matplotlib on OSX' in the Matplotlib FAQ for more information.

Process finished with exit code 1

编码执行时出现的问题，不知道该怎么解决