1/^class Animation/i
2
3import matplotlib.pyplot as plt
4class BackendError(RuntimeError):
5    pass
6
7.
8/self\._blit = blit/i
9        if blit and plt.get_backend().lower() == 'macosx':
10            raise BackendError('''The current backend is 'MacOSX'
11and may go into an infinite loop with blit turned on.  Either
12turn off blit or use an alternate backend, for example, like
13'TKAgg', using the following prepended to your source code:
14
15import matplotlib
16matplotlib.use('TKAgg')
17''')
18.
19w
20