ImportError:无法导入名称“”QtCore“”
ImportError:无法导入名称“”QtCore“”
提问于 2016-09-19 21:38:42
我在下面的导入中得到下面的错误。这似乎与大熊猫进口有关。我不确定如何调试/解决这个问题。
导入：
import pandas as pd
import numpy as np
import pdb, math, pickle
import matplotlib.pyplot as plt错误：
In [1]: %run NN.py
---------------------------------------------------------------------------
ImportError Traceback (most recent call last)
/home/abhishek/Desktop/submission/a1/new/NN.py in <module>()
2 import numpy as np
3 import pdb, math, pickle
----> 4 import matplotlib.pyplot as plt
5
6 class NN(object):
/home/abhishek/anaconda3/lib/python3.5/site-packages/matplotlib/pyplot.py in <module>()
112
113 from matplotlib.backends import pylab_setup
--> 114 _backend_mod, new_figure_manager, draw_if_interactive, _show = pylab_setup()
115
116 _IP_REGISTERED = None
/home/abhishek/anaconda3/lib/python3.5/site-packages/matplotlib/backends/__init__.py in pylab_setup()
30 # imports. 0 means only perform absolute imports.
31 backend_mod = __import__(backend_name,
---> 32 globals(),locals(),[backend_name],0)
33
34 # Things we pull in from all backends
/home/abhishek/anaconda3/lib/python3.5/site-packages/matplotlib/backends/backend_qt4agg.py in <module>()
16
17
---> 18 from .backend_qt5agg import FigureCanvasQTAggBase as _FigureCanvasQTAggBase
19
20 from .backend_agg import FigureCanvasAgg
/home/abhishek/anaconda3/lib/python3.5/site-packages/matplotlib/backends/backend_qt5agg.py in <module>()
14
15 from .backend_agg import FigureCanvasAgg
---> 16 from .backend_qt5 import QtCore
17 from .backend_qt5 import QtGui
18 from .backend_qt5 import FigureManagerQT
/home/abhishek/anaconda3/lib/python3.5/site-packages/matplotlib/backends/backend_qt5.py in <module>()
29 figureoptions = None
30
---> 31 from .qt_compat import QtCore, QtGui, QtWidgets, _getSaveFileName, __version__
32 from matplotlib.backends.qt_editor.formsubplottool import UiSubplotTool
33
/home/abhishek/anaconda3/lib/python3.5/site-packages/matplotlib/backends/qt_compat.py in <module>()
135 # have been changed in the above if block
136 if QT_API in [QT_API_PYQT, QT_API_PYQTv2]: # PyQt4 API
--> 137 from PyQt4 import QtCore, QtGui
138
139 try:
ImportError: cannot import name 'QtCore'调试：
$ python -c "import PyQt4"
$ python -c "from PyQt4 import QtCore"
Traceback (most recent call last):
File "<string>", line 1, in <module>
ImportError: cannot import name 'QtCore'
$ conda list | grep qt
jupyter-qtconsole-colorschemes 0.7.1 <pip>
pyqt 5.6.0 py35_0
qt 5.6.0 0
qtawesome 0.3.3 py35_0
qtconsole 4.2.1 py35_0
qtpy 1.0.2 py35_0 我找到了其他答案，但都与Windows有关。我使用的是ubuntu 16.04和python 3的anaconda发行版。
回答 8
Stack Overflow用户
发布于 2016-09-19 23:50:02
将pyqt版本5.6.0降级至4.11.4，并将qt从版本5.6.0降级至4.8.7可修复此问题：
$ conda install pyqt=4.11.4
$ conda install qt=4.8.7这个问题本身在这里得到了解决：https://github.com/ContinuumIO/anaconda-issues/issues/1068
Stack Overflow用户
发布于 2016-09-29 04:15:42
为了避免降级，您还可以(正如tacaswell在问题中建议的那样)使用下面的方法之一设置后端来使用Qt5Agg：http://matplotlib.org/faq/usage_faq.html#what-is-a-backend
例如，您可以修改/your/path/to/anaconda3/envs/yourenv/lib/python3.5/site-packages/matplotlib/mpl-data/matplotlibrc中的matplotlibrc文件，并将后端行更改为backend : Qt5Agg。这将使Qt5Agg后端成为整个yourenv conda环境的默认值。
Stack Overflow用户
发布于 2016-10-19 00:52:03
更新matplotlib为我解决了这个问题：
conda install matplotlib页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/39574639
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