如何抑制/忽略（/修复）matplotlib Axes3D ValueError？

Question

根据要求，这是最小的工作示例（如下）;我很抱歉这很多，但这似乎是一个需要开销结构的问题（特别是两个单独的选项卡上同时存在2d和3d轴，但不是当3d或2d单独存在时）：

import sys, os
pyDir = os.path.dirname(os.path.abspath(__file__)) #python file location

from pyface.qt import QtGui, QtCore
os.environ['ETS_TOOLKIT'] = 'qt4'
import sip
sip.setapi('QString', 2)
import matplotlib
matplotlib.use('Agg')
#matplotlib.use('Qt4Agg')
from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.backends.backend_qt4agg import NavigationToolbar2QT as NavigationToolbar
from matplotlib.figure import Figure
from matplotlib.widgets import Slider, Button
import mpl_toolkits.axes_grid1
import matplotlib.path as pltPath
import matplotlib.image as mpimg
from matplotlib.ticker import MaxNLocator
from matplotlib import rc
from mpl_toolkits.mplot3d import Axes3D


class P4(QtGui.QWidget):

    def __init__(self, parent=None):
        super(P4, self).__init__(parent)
        P4.layout = QtGui.QGridLayout(self)
        P4.layout.setContentsMargins(20,20,20,20)
        P4.layout.setSpacing(10)

        P4.button_pic1 = QtGui.QPushButton('View Plots', self)
        P4.button_pic1.clicked.connect(self.RC_vid1)
        P4.layout.addWidget(P4.button_pic1, 2, 8, 1, 1)
        P4.button_pic1.show()

    def RC_vid1(self):

        global PrD_window
        try:
            PrD_window.close()
        except:
            pass

        PrD_window = PrD_Viz()
        PrD_window.show()

################################################################################

class PrD_Viz(QtGui.QMainWindow):
    def __init__(self):
        super(PrD_Viz, self).__init__()
        self.left = 10
        self.top = 10
        self.initUI()

    def initUI(self):
        vid_tab2 = ManifoldCanvas(self)
        vid_tab3 = PsiCanvas(self)
        global vid_tabs
        vid_tabs = QtGui.QTabWidget(self)
        vid_tabs.addTab(vid_tab2, 'Plot 1')
        vid_tabs.addTab(vid_tab3, 'Plot 2')

        style = """QTabWidget::tab-bar{
                alignment: center;
                }"""
        self.setStyleSheet(style)
        self.setCentralWidget(vid_tabs)
        self.setWindowModality(QtCore.Qt.ApplicationModal) #freezes out parent window
        self.show()

class ManifoldCanvas(QtGui.QDialog):
    pts_orig = []

    def __init__(self, parent=None):
        super(ManifoldCanvas, self).__init__(parent)

        self.figure = Figure(dpi=200)
        self.ax = self.figure.add_subplot(111)
        self.figure.set_tight_layout(True)
        self.canvas = FigureCanvas(self.figure)
        self.toolbar = NavigationToolbar(self.canvas, self)

        x=[1,5,9]
        y=[2,6,10]

        ManifoldCanvas.pts_orig = zip(x,y)
        for i in ManifoldCanvas.pts_orig:
            x,y = i
            self.ax.scatter(x,y,s=1,c='#1f77b4')

        self.canvas.draw_idle()

        layout = QtGui.QGridLayout()
        layout.setSizeConstraint(QtGui.QLayout.SetMinimumSize)
        layout.addWidget(self.toolbar, 0,0,1,5)
        layout.addWidget(self.canvas, 1,0,1,5)

        self.setLayout(layout)

class PsiCanvas(QtGui.QDialog):

    def __init__(self, parent=None):
        super(PsiCanvas, self).__init__(parent)

        self.psi1 = [10,11,12]
        self.psi2 = [24,19,18]
        self.psi3 = [99,90, 105]

        # create canvas and plot data:
        self.figure = Figure(dpi=200)
        self.canvas = FigureCanvas(self.figure)
        self.toolbar = NavigationToolbar(self.canvas, self)
        self.ax = Axes3D(self.figure)
        self.ax.mouse_init()

        self.ax.scatter(self.psi1, self.psi2, self.psi3, label='psi_dif', linewidths= .5, edgecolors='k', c='#d62728') #C3

        self.canvas.draw_idle() #refresh canvas

        layout = QtGui.QGridLayout()
        layout.setSizeConstraint(QtGui.QLayout.SetMinimumSize)
        layout.addWidget(self.toolbar, 0,0,1,4)
        layout.addWidget(self.canvas, 1,0,4,4)

        self.setLayout(layout)

################################################################################
# overhead GUI control: 

class MainWindow(QtGui.QMainWindow):
    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)

        tab4 = P4(self)

        global tabs
        tabs = QtGui.QTabWidget(self)
        tabs.resize(250,150)

        tabs.addTab(tab4, 'Eigenfunctions')

        self.setCentralWidget(tabs)
        self.show()


if __name__ == '__main__':

    app = QtGui.QApplication.instance()
    if app is None:
        app = QtGui.QApplication([])

    w = MainWindow()
    sys.exit(app.exec_())

该图在linux和macOS上表现完美（在macOS上没有警告），但是在linux上，每次在GUI中显示绘图（最终污染终端）时，我都会收到这段可怕的错误：

/data/ees/anaconda/envs/manifold/lib/python2.7/site-packages/mpl_toolkits/mplot3d/axis3d.py:270: RuntimeWarning: invalid value encountered in true_divide
  ax_scale = self.axes.bbox.size / self.figure.bbox.size
Traceback (most recent call last):
  File "/data/ees/anaconda/envs/manifold/lib/python2.7/site-packages/matplotlib/backends/backend_qt5agg.py", line 176, in __draw_idle_agg
    FigureCanvasAgg.draw(self)
  File "/data/ees/anaconda/envs/manifold/lib/python2.7/site-packages/matplotlib/backends/backend_agg.py", line 474, in draw
    self.figure.draw(self.renderer)
  File "/data/ees/anaconda/envs/manifold/lib/python2.7/site-packages/matplotlib/artist.py", line 61, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/data/ees/anaconda/envs/manifold/lib/python2.7/site-packages/matplotlib/figure.py", line 1159, in draw
    func(*args)
  File "/data/ees/anaconda/envs/manifold/lib/python2.7/site-packages/mpl_toolkits/mplot3d/axes3d.py", line 290, in draw
    ax.draw(renderer)
  File "/data/ees/anaconda/envs/manifold/lib/python2.7/site-packages/mpl_toolkits/mplot3d/axis3d.py", line 288, in draw
    self.label.draw(renderer)
  File "/data/ees/anaconda/envs/manifold/lib/python2.7/site-packages/matplotlib/artist.py", line 61, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/data/ees/anaconda/envs/manifold/lib/python2.7/site-packages/matplotlib/text.py", line 757, in draw
    raise ValueError("posx and posy should be finite values")
ValueError: posx and posy should be finite values

我想要抑制此错误或修复它;任何建议都会受到极大的赞赏。

Answer 1

更新：这里的解决方案是简单地删除工具栏 - 显然在2d和3d工具栏同时处于活动状态之间会有一些背景竞争（但不适用于2d和2d工具栏）......很奇怪。我将离开我的另一个回复在这个下面，以防任何人遇到类似的东西，这样的解决方案可能会有所帮助。

---

以下是此问题的解决方法;请查看评论NEW，了解修复所需的一切。基本上，当同时需要matplotlib的2d和3d轴时（尽管在两个单独的选项卡上），会发生此错误。现在，每个图都是在标签点击时实时构建的。

import sys, os
pyDir = os.path.dirname(os.path.abspath(__file__)) #python file location

from pyface.qt import QtGui, QtCore
os.environ['ETS_TOOLKIT'] = 'qt4'
import sip
sip.setapi('QString', 2)
import matplotlib
matplotlib.use('Agg')
#matplotlib.use('Qt4Agg')
from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.backends.backend_qt4agg import NavigationToolbar2QT as NavigationToolbar
from matplotlib.figure import Figure
from matplotlib.widgets import Slider, Button
import mpl_toolkits.axes_grid1
import matplotlib.path as pltPath
import matplotlib.image as mpimg
from matplotlib.ticker import MaxNLocator
from matplotlib import rc
from mpl_toolkits.mplot3d import Axes3D


class P4(QtGui.QWidget):

    def __init__(self, parent=None):
        super(P4, self).__init__(parent)
        P4.layout = QtGui.QGridLayout(self)
        P4.layout.setContentsMargins(20,20,20,20)
        P4.layout.setSpacing(10)

        P4.button_pic1 = QtGui.QPushButton('View Plots', self)
        P4.button_pic1.clicked.connect(self.RC_vid1)
        P4.layout.addWidget(P4.button_pic1, 2, 8, 1, 1)
        P4.button_pic1.show()

    def RC_vid1(self):

        global PrD_window
        try:
            PrD_window.close()
        except:
            pass

        PrD_window = PrD_Viz()
        PrD_window.show()

################################################################################

class PrD_Viz(QtGui.QMainWindow):

    currentTab = 0 #NEW

    def __init__(self):
        super(PrD_Viz, self).__init__()
        self.left = 10
        self.top = 10
        self.initUI()

    def initUI(self):
        vid_tab2 = ManifoldCanvas(self)
        vid_tab3 = PsiCanvas(self)
        global vid_tabs
        vid_tabs = QtGui.QTabWidget(self)
        vid_tabs.addTab(vid_tab2, 'Plot 1')
        vid_tabs.addTab(vid_tab3, 'Plot 2')


        style = """QTabWidget::tab-bar{
                alignment: center;
                }"""
        self.setStyleSheet(style)
        self.setCentralWidget(vid_tabs)
        self.setWindowModality(QtCore.Qt.ApplicationModal) #freezes out parent window

        if PrD_Viz.currentTab == 1: #NEW
            vid_tabs.setCurrentIndex(1) #NEW
        #NEW:
        vid_tabs.currentChanged.connect(self.onTabChange) #signal for tabs changed via direct click

        self.show()
    #NEW:
    def onTabChange(self, i):
        if i == 0:
            PrD_Viz.currentTab = 0
            self.initUI()
        elif i == 1:
            PrD_Viz.currentTab = 1
            self.initUI()


class ManifoldCanvas(QtGui.QDialog):
    pts_orig = []

    def __init__(self, parent=None):
        super(ManifoldCanvas, self).__init__(parent)

        if PrD_Viz.currentTab == 0: #NEW
            self.figure = Figure(dpi=200)
            self.canvas = FigureCanvas(self.figure)
            self.toolbar = NavigationToolbar(self.canvas, self)
            self.ax = self.figure.add_subplot(111)

            x=[1,5,9,8]
            y=[2,6,10,11]

            ManifoldCanvas.pts_orig = zip(x,y)
            for i in ManifoldCanvas.pts_orig:
                x,y = i
                self.ax.scatter(x,y,s=1,c='#1f77b4')

            self.canvas.draw_idle()

            layout = QtGui.QGridLayout()
            layout.setSizeConstraint(QtGui.QLayout.SetMinimumSize)
            layout.addWidget(self.toolbar, 0,0,1,5)
            layout.addWidget(self.canvas, 1,0,1,5)

            self.setLayout(layout)

class PsiCanvas(QtGui.QDialog):

    def __init__(self, parent=None):
        super(PsiCanvas, self).__init__(parent)

        if PrD_Viz.currentTab == 1: #NEW

            self.psi1 = [10,11,12]
            self.psi2 = [24,19,18]
            self.psi3 = [99,90, 105]

            # create canvas and plot data:
            self.figure = Figure(dpi=200)
            self.canvas = FigureCanvas(self.figure)
            self.toolbar = NavigationToolbar(self.canvas, self)
            self.ax = Axes3D(self.figure)
            self.ax.mouse_init()

            self.ax.scatter(self.psi1, self.psi2, self.psi3, label='psi_dif', linewidths= .5, edgecolors='k', c='#d62728') #C3

            self.canvas.draw_idle() #refresh canvas

            layout = QtGui.QGridLayout()
            layout.setSizeConstraint(QtGui.QLayout.SetMinimumSize)
            layout.addWidget(self.toolbar, 0,0,1,4)
            layout.addWidget(self.canvas, 1,0,4,4)

            self.setLayout(layout)


################################################################################
# overhead GUI control: 

class MainWindow(QtGui.QMainWindow):
    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)

        tab4 = P4(self)

        global tabs
        tabs = QtGui.QTabWidget(self)
        tabs.resize(250,150)

        tabs.addTab(tab4, 'Eigenfunctions')

        self.setCentralWidget(tabs)
        self.show()


if __name__ == '__main__':

    app = QtGui.QApplication.instance()
    if app is None:
        app = QtGui.QApplication([])

    w = MainWindow()
    sys.exit(app.exec_())