Python AttributeError：'figure（）'不是Qt属性或信号

Posted 2021-03-27

下面是我正在尝试运行的简单代码：

from matplotlib import pyplot as plt

movies=["Annie", "Ben","Casa", "Gandhi", "West"]
num_oscars=[5,11,3,8,10]

xs=[i+0.1 for i, _ in enumerate(movies)]

plt.bar(xs,num_oscars)

我收到以下错误（在pycharm中运行，Anaconda安装，python 2.7）：

Traceback (most recent call last):
  File "C:/Users/AlexPower/Desktop/python/myCode/ch2_new_1", line 15, in <module>
    plt.bar(xs,num_oscars)
  File "C:UsersAlexPowerAnaconda2libsite-packagesmatplotlibpyplot.py", line 2692, in bar
    ax = gca()
  File "C:UsersAlexPowerAnaconda2libsite-packagesmatplotlibpyplot.py", line 950, in gca
    return gcf().gca(**kwargs)
  File "C:UsersAlexPowerAnaconda2libsite-packagesmatplotlibpyplot.py", line 586, in gcf
    return figure()
  File "C:UsersAlexPowerAnaconda2libsite-packagesmatplotlibpyplot.py", line 535, in figure
    **kwargs)
  File "C:UsersAlexPowerAnaconda2libsite-packagesmatplotlibackendsackend_qt5agg.py", line 44, in new_figure_manager
    return new_figure_manager_given_figure(num, thisFig)
  File "C:UsersAlexPowerAnaconda2libsite-packagesmatplotlibackendsackend_qt5agg.py", line 51, in new_figure_manager_given_figure
    canvas = FigureCanvasQTAgg(figure)
  File "C:UsersAlexPowerAnaconda2libsite-packagesmatplotlibackendsackend_qt5agg.py", line 242, in __init__
    super(FigureCanvasQTAgg, self).__init__(figure=figure)
  File "C:UsersAlexPowerAnaconda2libsite-packagesmatplotlibackendsackend_qt5agg.py", line 66, in __init__
    super(FigureCanvasQTAggBase, self).__init__(figure=figure)
  File "C:UsersAlexPowerAnaconda2libsite-packagesmatplotlibackendsackend_qt5.py", line 243, in __init__
    super(FigureCanvasQT, self).__init__(figure=figure) 


AttributeError: 'figure()' is not a Qt property or a signal

我在网上搜索，确实喜欢

import os

    if 'QT_API' not in os.environ and 'ETS_TOOLKIT' not in os.environ: 
        os.environ['QT_API'] = 'pyqt'
        os.environ['ETS_TOOLKIT'] = 'qt4

它没有帮助。

好心提醒。

答案

运行Canopy环境时遇到同样的问题。我在编辑器中看到了问题，但在iPython中正确绘制。原来PyLab后端配置错误，并尝试PyQT4。我把它改成了Interactive（wx），现在工作正常。