[英]%matplotlib qt ends in error - calls PyQt5 instead of PyQt4
I am trying to open graphics in a new window using the command %matplotlib qt in ipython/spyder, but it shows following error 我正在尝试在ipython / spyder中使用命令%matplotlib qt在新窗口中打开图形,但显示以下错误
%matplotlib qt
Traceback (most recent call last):
File "<ipython-input-1-4460ac8d7abe>", line 1, in <module>
get_ipython().magic(u'matplotlib qt')
File "/usr/lib/python2.7/site-packages/IPython/core/interactiveshell.py", line 2160, in magic
return self.run_line_magic(magic_name, magic_arg_s)
File "/usr/lib/python2.7/site-packages/IPython/core/interactiveshell.py", line 2081, in run_line_magic
result = fn(*args,**kwargs)
File "<decorator-gen-105>", line 2, in matplotlib
File "/usr/lib/python2.7/site-packages/IPython/core/magic.py", line 188, in <lambda>
call = lambda f, *a, **k: f(*a, **k)
File "/usr/lib/python2.7/site-packages/IPython/core/magics/pylab.py", line 100, in matplotlib
gui, backend = self.shell.enable_matplotlib(args.gui)
File "/usr/lib/python2.7/site-packages/IPython/core/interactiveshell.py", line 2950, in enable_matplotlib
pt.activate_matplotlib(backend)
File "/usr/lib/python2.7/site-packages/IPython/core/pylabtools.py", line 309, in activate_matplotlib
matplotlib.pyplot.switch_backend(backend)
File "/usr/lib64/python2.7/site-packages/matplotlib/pyplot.py", line 231, in switch_backend
_backend_mod, new_figure_manager, draw_if_interactive, _show = pylab_setup()
File "/usr/lib64/python2.7/site-packages/matplotlib/backends/__init__.py", line 60, in pylab_setup
[backend_name], 0)
File "/usr/lib64/python2.7/site-packages/matplotlib/backends/backend_qt5agg.py", line 16, in <module>
from .backend_qt5 import (
File "/usr/lib64/python2.7/site-packages/matplotlib/backends/backend_qt5.py", line 18, in <module>
import matplotlib.backends.qt_editor.figureoptions as figureoptions
File "/usr/lib64/python2.7/site-packages/matplotlib/backends/qt_editor/figureoptions.py", line 20, in <module>
import matplotlib.backends.qt_editor.formlayout as formlayout
File "/usr/lib64/python2.7/site-packages/matplotlib/backends/qt_editor/formlayout.py", line 56, in <module>
from matplotlib.backends.qt_compat import QtGui, QtWidgets, QtCore
File "/usr/lib64/python2.7/site-packages/matplotlib/backends/qt_compat.py", line 137, in <module>
from PyQt5 import QtCore, QtGui, QtWidgets
ImportError: No module named PyQt5
I didn't install PyQt5, but installed PyQt4 in centos 7.4. 我没有安装PyQt5,但是在centos 7.4中安装了PyQt4。 Also modified the file matplotlibrc (/usr/lib64/python2.7/site-packages/matplotlib/mpl-data/matplotlibrc) file to change backend and as follows:
还修改了文件matplotlibrc(/usr/lib64/python2.7/site-packages/matplotlib/mpl-data/matplotlibrc)文件以更改后端,如下所示:
# If you omit this parameter, it will always default to "Agg", which is a
# non-interactive backend.
backend : Qt4Agg
# If you are using the Qt4Agg backend, you can choose here
# to use the PyQt4 bindings or the newer PySide bindings to
# the underlying Qt4 toolkit.
backend.qt4 : PyQt4 # PyQt4 | PySide
But still it calls PyQt5. 但它仍然称为PyQt5。 After running the command "%matplotlib qt", the back-end changed back into Qt5Agg (print matplotlib.rcParams['backend']), even I wrote Qt4Agg in matplotlibrc.
运行命令“%matplotlib qt”后,即使我在matplotlibrc中编写了Qt4Agg,后端也变回了Qt5Agg(打印matplotlib.rcParams ['backend'])。
Note:- I tried "%matplotlib qt4" also 注意:-我也尝试过“%matplotlib qt4”
Warning: Cannot change to a different GUI toolkit: qt4. Using qt instead.
Please refer to the IPython 5 configuration page . 请参考IPython 5配置页面 。 I don't have a IPython 5 and Python 2.7 set up so I cannot give you the exact configuration code.
我没有设置IPython 5和Python 2.7,所以我无法为您提供确切的配置代码。 But inorder to make IPython use Qt4 you will have to follow the following steps:
但是为了使IPython使用Qt4,您必须遵循以下步骤:
Hope that helps. 希望能有所帮助。
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