报错信息：
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.
今天在使用labelme标注工具的时候报错如上，看了网上许多方法，亲测可行：
找到自己工程文件中“import matplotlib.pyplot as plt”所在地，在它之前添加两句话：
import matplotlib
matplotlib.use('TkAgg')如何定位import matplotlib.pyplot as plt写在哪里？一般报错信息会给出，如我的：
把地址复制下来，打开Finder，用快捷键shift+command+G，快速定位到这个文件。打开后，加上那两句话：
解决！
还有其他方法。以及具体的原因，有兴趣深究请到https://stackoverflow.com上查询，老外们讲得比较详细~