matplotlib中文乱码

添加两句代码:

plt.rcParams['font.sans-serif'] = ['SimHei']
plt.rcParams['axes.unicode_minus'] = False

# coding=utf-8


import matplotlib.pyplot as plt


decisionNode = dict(boxstyle='sawtooth', fc='0.8')

leafNode = dict(boxstyle='round4', fc='0.8')

arrow_args = dict(arrowstyle='<-')

def plotNode(nodeTxt, centerPt, parentPt, nodeType):
    createPlot.ax1.annotate(nodeTxt, xy=parentPt, xycoords='axes fraction',
                           xytext=centerPt, textcoords='axes fraction',
                           va="center", ha="center", bbox=nodeType, arrowprops=arrow_args)

def createPlot():
    fig = plt.figure(1, facecolor = 'white')
    fig.clf()

    createPlot.ax1 = plt.subplot(111, frameon=False)
    plt.rcParams['font.sans-serif'] = ['SimHei']
    plt.rcParams['axes.unicode_minus'] = False
    plotNode('决策节点', (0.5, 0.1), (0.1, 0.5), decisionNode)
    plotNode('叶节点', (0.8, 0.1), (0.3, 0.8), leafNode)
    plt.show()


if __name__ == '__main__':
    createPlot()