# PyQt4 版本（网传）#from matplotlib.backends.backend_qt4agg import NavigationToolbar2QTAgg as NavigationToolbar # PyQt5 版本from matplotlib.backends.backend_qt5 import NavigationToolbar2QT as NavigationToolbar

import sysfrom PyQt5 import QtWidgets from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvasfrom matplotlib.backends.backend_qt5 import NavigationToolbar2QT as NavigationToolbarimport matplotlib.pyplot as plt import random class Window(QtWidgets.QDialog):    def __init__(self, parent=None):        super().__init__(parent)         self.figure = plt.figure()        self.axes = self.figure.add_subplot(111)        # We want the axes cleared every time plot() is called        self.axes.hold(False)        self.canvas = FigureCanvas(self.figure)                  self.toolbar = NavigationToolbar(self.canvas, self)        self.toolbar.hide()         # Just some button         self.button1 = QtWidgets.QPushButton('Plot')        self.button1.clicked.connect(self.plot)         self.button2 = QtWidgets.QPushButton('Zoom')        self.button2.clicked.connect(self.zoom)                 self.button3 = QtWidgets.QPushButton('Pan')        self.button3.clicked.connect(self.pan)                 self.button4 = QtWidgets.QPushButton('Home')        self.button4.clicked.connect(self.home)          # set the layout        layout = QtWidgets.QVBoxLayout()        layout.addWidget(self.toolbar)        layout.addWidget(self.canvas)                btnlayout = QtWidgets.QHBoxLayout()        btnlayout.addWidget(self.button1)        btnlayout.addWidget(self.button2)        btnlayout.addWidget(self.button3)        btnlayout.addWidget(self.button4)        qw = QtWidgets.QWidget(self)        qw.setLayout(btnlayout)        layout.addWidget(qw)                self.setLayout(layout)     def home(self):        self.toolbar.home()    def zoom(self):        self.toolbar.zoom()    def pan(self):        self.toolbar.pan()             def plot(self):        ''' plot some random stuff '''        data = [random.random() for i in range(25)]        self.axes.plot(data, '*-')        self.canvas.draw() if __name__ == '__main__':    app = QtWidgets.QApplication(sys.argv)     main = Window()    main.setWindowTitle('Simple QTpy and MatplotLib example with Zoom/Pan')    main.show()     sys.exit(app.exec_())

import sys, os, randomfrom PyQt5.QtCore import *from PyQt5.QtGui import *from PyQt5.QtWidgets import *import matplotlibmatplotlib.use('Qt5Agg')from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvasfrom matplotlib.backends.backend_qt5 import NavigationToolbar2QT as NavigationToolbarfrom matplotlib.figure import Figureclass AppForm(QMainWindow):    def __init__(self, parent=None):        QMainWindow.__init__(self, parent)        self.setWindowTitle('Demo: PyQt with matplotlib')        self.create_menu()        self.create_main_frame()        self.create_status_bar()        self.textbox.setText('1 2 3 4')        self.on_draw()    def save_plot(self):        file_choices = "PNG (*.png)|*.png"                path = QFileDialog.getSaveFileName(self,                         'Save file', '',                         file_choices)        if path:            self.canvas.print_figure(path, dpi=self.dpi)            self.statusBar().showMessage('Saved to %s' % path, 2000)        def on_about(self):        msg = """ A demo of using PyQt with matplotlib:                 * Use the matplotlib navigation bar         * Add values to the text box and press Enter (or click "Draw")         * Show or hide the grid         * Drag the slider to modify the width of the bars         * Save the plot to a file using the File menu         * Click on a bar to receive an informative message        """        QMessageBox.about(self, "About the demo", msg.strip())        def on_pick(self, event):        # The event received here is of the type        # matplotlib.backend_bases.PickEvent        #        # It carries lots of information, of which we're using        # only a small amount here.        #         box_points = event.artist.get_bbox().get_points()        msg = "You've clicked on a bar with coords:\n %s" % box_points                QMessageBox.information(self, "Click!", msg)        def on_draw(self):        """ Redraws the figure        """        #str = unicode(self.textbox.text())        self.data = list(map(int, self.textbox.text().split()))                x = range(len(self.data))        # clear the axes and redraw the plot anew        #        self.axes.clear()                self.axes.grid(self.grid_cb.isChecked())                self.axes.bar(            left=x,             height=self.data,             width=self.slider.value() / 100.0,             align='center',             alpha=0.44,            picker=5)                self.canvas.draw()        def create_main_frame(self):        self.main_frame = QWidget()                # Create the mpl Figure and FigCanvas objects.         # 5x4 inches, 100 dots-per-inch        #        self.dpi = 100        self.fig = Figure((5.0, 4.0), dpi=self.dpi)        self.canvas = FigureCanvas(self.fig)        self.canvas.setParent(self.main_frame)                # Since we have only one plot, we can use add_axes         # instead of add_subplot, but then the subplot        # configuration tool in the navigation toolbar wouldn't        # work.        #        self.axes = self.fig.add_subplot(111)                # Bind the 'pick' event for clicking on one of the bars        #        self.canvas.mpl_connect('pick_event', self.on_pick)                # Create the navigation toolbar, tied to the canvas        #        self.mpl_toolbar = NavigationToolbar(self.canvas, self.main_frame)                # Other GUI controls        #         self.textbox = QLineEdit()        self.textbox.setMinimumWidth(200)        self.textbox.editingFinished.connect(self.on_draw)                self.draw_button = QPushButton("&Draw")        self.draw_button.clicked.connect(self.on_draw)                        self.grid_cb = QCheckBox("Show &Grid")        self.grid_cb.setChecked(False)        self.grid_cb.stateChanged.connect(self.on_draw) #int                slider_label = QLabel('Bar width (%):')        self.slider = QSlider(Qt.Horizontal)        self.slider.setRange(1, 100)        self.slider.setValue(20)        self.slider.setTracking(True)        self.slider.setTickPosition(QSlider.TicksBothSides)        self.slider.valueChanged.connect(self.on_draw)#int                #        # Layout with box sizers        #         hbox = QHBoxLayout()                for w in [  self.textbox, self.draw_button, self.grid_cb,                    slider_label, self.slider]:            hbox.addWidget(w)            hbox.setAlignment(w, Qt.AlignVCenter)                vbox = QVBoxLayout()        vbox.addWidget(self.mpl_toolbar)        vbox.addWidget(self.canvas)        vbox.addLayout(hbox)                self.main_frame.setLayout(vbox)        self.setCentralWidget(self.main_frame)        def create_status_bar(self):        self.status_text = QLabel("This is a demo")        self.statusBar().addWidget(self.status_text, 1)            def create_menu(self):                self.file_menu = self.menuBar().addMenu("&File")                load_file_action = self.create_action("&Save plot",            shortcut="Ctrl+S", slot=self.save_plot,             tip="Save the plot")        quit_action = self.create_action("&Quit", slot=self.close,             shortcut="Ctrl+Q", tip="Close the application")                self.add_actions(self.file_menu,             (load_file_action, None, quit_action))                self.help_menu = self.menuBar().addMenu("&Help")        about_action = self.create_action("&About",             shortcut='F1', slot=self.on_about,             tip='About the demo')                self.add_actions(self.help_menu, (about_action,))    def add_actions(self, target, actions):        for action in actions:            if action is None:                target.addSeparator()            else:                target.addAction(action)    def create_action(  self, text, slot=None, shortcut=None,                         icon=None, tip=None, checkable=False,                         signal="triggered()"):        action = QAction(text, self)        if icon is not None:            action.setIcon(QIcon(":/%s.png" % icon))        if shortcut is not None:            action.setShortcut(shortcut)        if tip is not None:            action.setToolTip(tip)            action.setStatusTip(tip)        if slot is not None:            action.triggered.connect(slot)        if checkable:            action.setCheckable(True)        return actiondef main():    app = QApplication(sys.argv)    form = AppForm()    form.show()    app.exec_()    if __name__ == "__main__":    main()