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

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-packagesmatplotlibbackendsbackend_qt5agg.py",line 44,in new_figure_manager
    return new_figure_manager_given_figure(num,thisFig)
  File "C:UsersAlexPowerAnaconda2libsite-packagesmatplotlibbackendsbackend_qt5agg.py",line 51,in new_figure_manager_given_figure
    canvas = FigureCanvasQTAgg(figure)
  File "C:UsersAlexPowerAnaconda2libsite-packagesmatplotlibbackendsbackend_qt5agg.py",line 242,in __init__
    super(FigureCanvasQTAgg,self).__init__(figure=figure)
  File "C:UsersAlexPowerAnaconda2libsite-packagesmatplotlibbackendsbackend_qt5agg.py",line 66,in __init__
    super(FigureCanvasQTAggBase,self).__init__(figure=figure)
  File "C:UsersAlexPowerAnaconda2libsite-packagesmatplotlibbackendsbackend_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.