matplotlib drawing error ImportError: No module named'PyQt4'

Today I used matplotlib to draw a picture and found that it could not be drawn, and an error was reported

import matplotlib.pyplot as plt
  File "D:\Anaconda3\lib\site-packages\matplotlib\pyplot.py", line 114, in <module>
    _backend_mod, new_figure_manager, draw_if_interactive, _show = pylab_setup()
  File "D:\Anaconda3\lib\site-packages\matplotlib\backends\__init__.py", line 32, in pylab_setup
    globals(),locals(),[backend_name],0)
  File "D:\Anaconda3\lib\site-packages\matplotlib\backends\backend_qt5agg.py", line 16, in <module>
    from .backend_qt5 import QtCore
  File "D:\Anaconda3\lib\site-packages\matplotlib\backends\backend_qt5.py", line 31, in <module>
    from .qt_compat import QtCore, QtGui, QtWidgets, _getSaveFileName, __version__
  File "D:\Anaconda3\lib\site-packages\matplotlib\backends\qt_compat.py", line 137, in <module>
    from PyQt4 import QtCore, QtGui
ImportError: No module named 'PyQt4'

ok, then I will check, there is a way like this

import matplotlib as mpl

mpl.use(‘Agg’)

No error was reported this time, but no picture at all

I thought about it, printed out the backend and found it was Qt5Agg

import matplotlib
# import matplotlib.pyplot as plt
backend = matplotlib.get_backend()
print(backend)

I want to give it a try, because I have done something similar before

I probably know that there are "TkAgg", "WXAgg", "Qt5Agg", other types have not been exposed

Just try to change it, the result is "TkAgg"

import matplotlib
# import matplotlib.pyplot as plt
backend = matplotlib.get_backend()
print(backend)
matplotlib.use('TkAgg')

So don’t worry about installing this and that when you encounter this problem

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Origin blog.csdn.net/baidu_36669549/article/details/106070138