[Matplotlib-users] how to draw text label for multi pie donuts

[不坏阿峰 <onl...@gm...>]

thanks to Joe Kington
<https://plus.google.com/u/0/115087865729901776991?prsrc=4>‘s help, i got
this pie donuts
i have modified code to  generate pie base one the Num of list.
but i do not know how to draw the text label like below, i need label
inform of each pie . pls give me some guide.
thanks a lot
[image: 内嵌图片 1]

#################################
from __future__ import unicode_literals
import matplotlib.pyplot as plt
import numpy as np

import sys # os, random
from PyQt4 import QtGui, QtCore

#from numpy import arange, sin, pi
from matplotlib import font_manager as fm
from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as
FigureCanvas
#from matplotlib.figure import Figure
from mychart_ui import Ui_Form


class MyMplCanvas(FigureCanvas):
    """Ultimately, this is a QWidget (as well as a FigureCanvasAgg,
etc.)."""
    def __init__(self, parent=None, width=5, height=4, dpi=100):
        #fig = Figure(figsize=(width, height), dpi=dpi)
        # self.axes = fig.add_subplot(111)
        # We want the axes cleared every time plot() is called
        #self.axes.hold(False)
        plt.rcParams['font.size'] = 9
        plt.rcParams['font.weight'] = 'normal'
        self.fig, self.axes = plt.subplots()
        self.compute_initial_figure()

        #
        FigureCanvas.__init__(self, self.fig)
        self.setParent(parent)

        FigureCanvas.setSizePolicy(self,
                                   QtGui.QSizePolicy.Expanding,
                                   QtGui.QSizePolicy.Expanding)
        FigureCanvas.updateGeometry(self)

    def compute_initial_figure(self):
        pass
class MyStaticMplCanvas(MyMplCanvas):
    """Simple canvas with a sine plot."""
    def compute_initial_figure(self):
        #fig, ax = plt.subplots()
        #ax.axis = ('equal')

        data = [[96, 124],[33, 64],[55, 96]]
        header = ['Hardware', 'Software']
        def pie_plot(myfig,myaxes,data):
            fig = myfig
            ax = myaxes
            ax.set_position([-0.12, 0.4, 0.6, 0.6])
            ax.axis('equal')
            ls = data
            r_len = 0.6
            width = r_len/(len(ls)+1)
            print width
            kwargs = dict(colors=['#66FF66', '#9999FF', '#FF9999'],
startangle=90)
            proptease = fm.FontProperties()
            proptease.set_size('xx-small')

            circle_ls = []
            for i in range(len(ls)):
                print i
                circle_ls.append(pie(ax, ls[i], radius=r_len-width*i,
pctdistance=1-width/2, **kwargs))
            # outside = pie(ax, ls[0], radius=r_len, pctdistance=1-width/2,
**kwargs)
            # middle = pie(ax,ls[1] , radius=r_len-width,
            #              pctdistance=1-width/2, **kwargs)
            # middle2 = pie(ax,ls[1] , radius=r_len-width*2,
            #              pctdistance=1-width/2, **kwargs)
            # inside = pie(ax,ls[2] , radius=r_len-width*3,
            #              pctdistance=1-width/2, **kwargs)

            plt.setp(circle_ls, width=width, edgecolor='white')

            ax.legend(circle_ls[0][::-1], header, frameon=False)

        pie_plot(self.fig,self.axes,data)
        kwargs = dict(size=13, color='white', va='center',
fontweight='bold')
        # ax.text(0, 0, 'Year 2005', ha='center',
        #         bbox=dict(boxstyle='round', facecolor='blue',
edgecolor='none'),
        #         **kwargs)
        # ax.annotate('Year 2006', (0, 0), xytext=(np.radians(-45), 1.1),
        #             bbox=dict(boxstyle='round', facecolor='green',
edgecolor='none'),
        #             textcoords='polar', ha='left', **kwargs)

        #ax.axes.plot()

def pie(ax, values, **kwargs):
    total = sum(values)
    def formatter(pct):
        return '{:0.0f}\n{:0.1f}%'.format(pct*total/100,pct)
    wedges, _, labels = ax.pie(values, autopct=formatter, **kwargs)
    return wedges


#plt.show()


class myWidget(QtGui.QWidget, Ui_Form):
    def __init__(self,parent=None):
        QtGui.QWidget.__init__(self, parent)
        self.setupUi(self)
        self.pushButton.clicked.connect(self.draw)

    def draw(self):
        print  '='
        sc = MyStaticMplCanvas(self.matwidget, width=2, height=3, dpi=100)
        sc.show()

qApp = QtGui.QApplication(sys.argv)

# aw = ApplicationWindow()
# aw.setWindowTitle("%s" % progname)
aw = myWidget()
aw.show()
sys.exit(qApp.exec_())
####################################