根据要求，这是最小的工作示例（如下）；非常抱歉，但这似乎是一个需要开销结构的问题（特别是同时在两个单独的选项卡上同时存在2d和3d轴，但单独使用3d或2d时并没有）：
/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
该图在linux和macOS上运行良好（在macOS上没有警告），但是在linux上，每次在GUI上显示该图时，都会收到这段可怕的错误段落（最终会污染终端）：
{{1}}
我想抑制此错误或对其进行修复；任何建议将不胜感激。
答案 0 :(得分：0)
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时会发生一些背景竞争（但对于2d和2d工具栏则不会） ... 奇怪的。如果有人遇到类似的情况而这种解决方法可能会有所帮助，我将在此下面给出其他答复。
以下是此问题的解决方法；请查看注释NEW，了解修复所需的所有内容。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，单击选项卡即可实时构建每个图。
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_())