Python 删除和重画Matplotlib动画
这个问题有几个部分,所以让我总结一下。我试图在PySide窗口中创建一个动画,然后根据新信息销毁并重新激活它。我创建了一个示例脚本来演示这一点,但它有点长,所以这里有一个概要:Python 删除和重画Matplotlib动画,python,matplotlib,pyside,Python,Matplotlib,Pyside,这个问题有几个部分,所以让我总结一下。我试图在PySide窗口中创建一个动画,然后根据新信息销毁并重新激活它。我创建了一个示例脚本来演示这一点,但它有点长,所以这里有一个概要: 使用PySide创建QtGui主窗口 在窗口中创建用于绘制动画的小部件 使用FuncAnimation设置小部件的动画 按下按钮时: 删除小部件和动画 使用不同的打印参数重新创建小部件 复活 在按下按钮之前,一切正常,我得到以下堆栈跟踪: Traceback (most recent call last): Fil
matplotlib-1.2.1
PySide-1.1.2
Python-2.7.4 编辑:
我按照代码从git进行源代码构建。我现在安装了1.4.x版。但是,原始问题仍然存在。这与
matplotlib
qtbackend中的一个错误有关,该错误会以错误的顺序将内容删除(请参阅)。添加
self.ui.mplWidget.close_event()
在ChangeStuff
中,会处理您遇到的异常,但不会显示新创建的画布
另一方面,我不明白为什么会显示任何画布,因为小部件从未添加到布局中。如果您稍微调整一下设置,并显式地将小部件添加/删除到gridLayout
中,它将执行您想要的操作:
from mpl_toolkits.mplot3d import Axes3D # @UnusedImport
from PySide import QtGui, QtCore
import matplotlib
import matplotlib.animation as animation
import sys
# specify the use of PySide
matplotlib.rcParams['backend.qt4'] = "PySide"
# import the figure canvas for interfacing with the backend
from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg \
as FigureCanvas
from matplotlib.figure import Figure
import numpy as np
from math import pi, cos, sin
class Ui_MainWindow(object):
def setupUi(self, MainWindow, direction, maxRadius):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(800, 500)
self.centralwidget = QtGui.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.horizontalLayout = QtGui.QHBoxLayout(self.centralwidget)
self.horizontalLayout.setObjectName("horizontalLayout")
self.pushButton = QtGui.QPushButton(self.centralwidget)
sizePolicy = QtGui.QSizePolicy(QtGui.QSizePolicy.Maximum,
QtGui.QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(
self.pushButton.sizePolicy().hasHeightForWidth())
self.pushButton.setSizePolicy(sizePolicy)
self.pushButton.setMaximumSize(QtCore.QSize(150, 16777215))
self.pushButton.setObjectName("pushButton")
self.pushButton.setText("Change Direction")
self.horizontalLayout.addWidget(self.pushButton)
self.frame = QtGui.QFrame(self.centralwidget)
self.frame.setFrameShape(QtGui.QFrame.StyledPanel)
self.frame.setFrameShadow(QtGui.QFrame.Raised)
self.frame.setObjectName("frame")
self.gridLayout = QtGui.QGridLayout(self.frame)
self.gridLayout.setObjectName("gridLayout")
self.horizontalLayout.addWidget(self.frame)
# ------
self.mplWidget = MplWidget(None, direction, maxRadius)
self.gridLayout.addWidget(self.mplWidget)
# ------
MainWindow.setCentralWidget(self.centralwidget)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
class MainWindow(QtGui.QMainWindow):
def __init__(self, parent=None):
super(MainWindow, self).__init__(parent)
self.ui = Ui_MainWindow()
self.direction = 'up'
self.maxRadius = 0.3
self.ui.setupUi(self, self.direction, self.maxRadius)
self.ui.pushButton.clicked.connect(self.changeStuff)
self.animation = self.ui.mplWidget.animate()
def changeStuff(self):
self.ui.mplWidget.close_event() # mpl clean up
self.ui.mplWidget.deleteLater() # QT cleanup
self.ui.gridLayout.removeWidget(self.ui.mplWidget)
dirs = {'up': 'down', 'down': 'up'}
rads = {0.3: 1, 1: 0.3}
self.direction = dirs[self.direction]
self.maxRadius = rads[self.maxRadius]
self.ui.mplWidget = MplWidget(self.ui.frame, self.direction,
self.maxRadius)
self.ui.gridLayout.addWidget(self.ui.mplWidget)
self.animation = self.ui.mplWidget.animate()
print self.ui.frame.children()
print 'finished change stuff'
class MplWidget(FigureCanvas):
def __init__(self, parent=None, direction='up', maxRadius=0.3):
self.figure = Figure()
super(MplWidget, self).__init__(self.figure)
self.setParent(parent)
self.axes = self.figure.add_subplot(111, projection='3d')
self.axes.set_xlabel("x label")
self.axes.set_ylabel("y label")
self.axes.set_zlabel("z label")
self.axes.set_xlim3d([-1, 1])
self.axes.set_ylim3d([-1, 1])
self.axes.set_zlim3d([-1, 1])
self.axes.set_aspect('equal')
if direction == 'up':
self.c = 1
elif direction == 'down':
self.c = -1
else:
self.c = 1
self.maxRadius = maxRadius
self.frames = 50
self.plot_handle = self.func_plot(self.frames)
def func_plot(self, z):
z /= float(self.frames) * self.c
theta = np.arange(0, 2 * pi + pi / 50, pi / 50)
xdata = self.maxRadius * z * np.array([cos(q) for q in theta])
ydata = self.maxRadius * z * np.array([sin(q) for q in theta])
zdata = z * np.ones(np.shape(xdata))
if not hasattr(self, 'plot_handle'):
plot_handle = self.axes.plot(xdata, ydata, zdata)[0]
else:
plot_handle = self.plot_handle
plot_handle.set_data(xdata, ydata)
plot_handle.set_3d_properties(zdata)
return plot_handle
def animate(self):
return animation.FuncAnimation(
fig=self.figure, func=self.func_plot, frames=self.frames,
interval=1000.0 / self.frames, blit=False)
if __name__ == "__main__":
app = QtGui.QApplication(sys.argv)
mw = MainWindow()
mw.show()
sys.exit(app.exec_())
这与
matplotlib
qtbackend中的一个错误有关,该错误会以错误的顺序破坏内容(请参阅)。添加
self.ui.mplWidget.close_event()
在ChangeStuff
中,会处理您遇到的异常,但不会显示新创建的画布
另一方面,我不明白为什么会显示任何画布,因为小部件从未添加到布局中。如果您稍微调整一下设置,并显式地将小部件添加/删除到gridLayout
中,它将执行您想要的操作:
from mpl_toolkits.mplot3d import Axes3D # @UnusedImport
from PySide import QtGui, QtCore
import matplotlib
import matplotlib.animation as animation
import sys
# specify the use of PySide
matplotlib.rcParams['backend.qt4'] = "PySide"
# import the figure canvas for interfacing with the backend
from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg \
as FigureCanvas
from matplotlib.figure import Figure
import numpy as np
from math import pi, cos, sin
class Ui_MainWindow(object):
def setupUi(self, MainWindow, direction, maxRadius):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(800, 500)
self.centralwidget = QtGui.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.horizontalLayout = QtGui.QHBoxLayout(self.centralwidget)
self.horizontalLayout.setObjectName("horizontalLayout")
self.pushButton = QtGui.QPushButton(self.centralwidget)
sizePolicy = QtGui.QSizePolicy(QtGui.QSizePolicy.Maximum,
QtGui.QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(
self.pushButton.sizePolicy().hasHeightForWidth())
self.pushButton.setSizePolicy(sizePolicy)
self.pushButton.setMaximumSize(QtCore.QSize(150, 16777215))
self.pushButton.setObjectName("pushButton")
self.pushButton.setText("Change Direction")
self.horizontalLayout.addWidget(self.pushButton)
self.frame = QtGui.QFrame(self.centralwidget)
self.frame.setFrameShape(QtGui.QFrame.StyledPanel)
self.frame.setFrameShadow(QtGui.QFrame.Raised)
self.frame.setObjectName("frame")
self.gridLayout = QtGui.QGridLayout(self.frame)
self.gridLayout.setObjectName("gridLayout")
self.horizontalLayout.addWidget(self.frame)
# ------
self.mplWidget = MplWidget(None, direction, maxRadius)
self.gridLayout.addWidget(self.mplWidget)
# ------
MainWindow.setCentralWidget(self.centralwidget)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
class MainWindow(QtGui.QMainWindow):
def __init__(self, parent=None):
super(MainWindow, self).__init__(parent)
self.ui = Ui_MainWindow()
self.direction = 'up'
self.maxRadius = 0.3
self.ui.setupUi(self, self.direction, self.maxRadius)
self.ui.pushButton.clicked.connect(self.changeStuff)
self.animation = self.ui.mplWidget.animate()
def changeStuff(self):
self.ui.mplWidget.close_event() # mpl clean up
self.ui.mplWidget.deleteLater() # QT cleanup
self.ui.gridLayout.removeWidget(self.ui.mplWidget)
dirs = {'up': 'down', 'down': 'up'}
rads = {0.3: 1, 1: 0.3}
self.direction = dirs[self.direction]
self.maxRadius = rads[self.maxRadius]
self.ui.mplWidget = MplWidget(self.ui.frame, self.direction,
self.maxRadius)
self.ui.gridLayout.addWidget(self.ui.mplWidget)
self.animation = self.ui.mplWidget.animate()
print self.ui.frame.children()
print 'finished change stuff'
class MplWidget(FigureCanvas):
def __init__(self, parent=None, direction='up', maxRadius=0.3):
self.figure = Figure()
super(MplWidget, self).__init__(self.figure)
self.setParent(parent)
self.axes = self.figure.add_subplot(111, projection='3d')
self.axes.set_xlabel("x label")
self.axes.set_ylabel("y label")
self.axes.set_zlabel("z label")
self.axes.set_xlim3d([-1, 1])
self.axes.set_ylim3d([-1, 1])
self.axes.set_zlim3d([-1, 1])
self.axes.set_aspect('equal')
if direction == 'up':
self.c = 1
elif direction == 'down':
self.c = -1
else:
self.c = 1
self.maxRadius = maxRadius
self.frames = 50
self.plot_handle = self.func_plot(self.frames)
def func_plot(self, z):
z /= float(self.frames) * self.c
theta = np.arange(0, 2 * pi + pi / 50, pi / 50)
xdata = self.maxRadius * z * np.array([cos(q) for q in theta])
ydata = self.maxRadius * z * np.array([sin(q) for q in theta])
zdata = z * np.ones(np.shape(xdata))
if not hasattr(self, 'plot_handle'):
plot_handle = self.axes.plot(xdata, ydata, zdata)[0]
else:
plot_handle = self.plot_handle
plot_handle.set_data(xdata, ydata)
plot_handle.set_3d_properties(zdata)
return plot_handle
def animate(self):
return animation.FuncAnimation(
fig=self.figure, func=self.func_plot, frames=self.frames,
interval=1000.0 / self.frames, blit=False)
if __name__ == "__main__":
app = QtGui.QApplication(sys.argv)
mw = MainWindow()
mw.show()
sys.exit(app.exec_())
尝试了#1,获得了一个新的堆栈跟踪,但随后修复了它。但是,它没有解决原始堆栈跟踪问题。尝试#2.尝试#1,获得了新的堆栈跟踪,但随后修复了它。但是,它没有解决原始堆栈跟踪问题。尝试#2.您正在混合
PyQt4
和PySides
。确保在matplotlibrc
文件中有行backend.qt4:PySides
。与其删除小部件和动画,不如刷新数据?稍后我会更仔细地看一下。确保matplotlib.\uuuuuu version\uuuuuuu
返回您期望的内容。谢谢!pyplot导入在任何情况下都是未使用的,但现在只要我在matplotlib导入pyplot为p之前动态设置matplotlib.rcParams['backend.qt4']='PySide'
,它就可以工作,我想这是有意义的。只是因为我有妄想症,我还将它添加到了matplotlibrc
文件中。@badc0re:在我的实际程序中,我希望根据用户的输入,在特定条件下显示或销毁动画。最直接的方法似乎是删除小部件,尽管我可以看到可能只是用setVisible(False)
隐藏绘图,而不是删除它。最后我可能会这么做。你把PyQt4
和PySides
混在一起了。确保在matplotlibrc
文件中有行backend.qt4:PySides
。与其删除小部件和动画,不如刷新数据?稍后我会更仔细地看一下。确保matplotlib.\uuuuuu version\uuuuuuu
返回您期望的内容。谢谢!pyplot导入在任何情况下都是未使用的,但现在只要我在matplotlib导入pyplot为p之前动态设置matplotlib.rcParams['backend.qt4']='PySide'
,它就可以工作,我想这是有意义的。只是因为我有妄想症,我还将它添加到了matplotlibrc
文件中。@badc0re:在我的实际程序中,我希望根据用户的输入,在特定条件下显示或销毁动画。最直接的方法似乎是删除小部件,尽管我可以看到可能只是用setVisible(False)
隐藏绘图,而不是删除它。我最终可能会这么做。