在 Raspberry Pi 上运行 PyQt5 - “PyQt5._QOpenGLFunctions_ES2”错误

Question

我在 Raspberry Pi 4 上运行 PyQt5 时遇到问题。

我使用树莓派 4，版本 10（buster）内核版本 4.19.75-v71。

默认的python是3.7.3。

我按照这个线程here 中提到的安装 sip 和 PyQt5 的完全相同的步骤进行操作。我还按照上述线程中介绍的步骤安装了 python 3.6.0。

在没有任何错误的情况下完成安装后，当我运行我的代码时，我遇到以下错误消息：

qt5ct: using qt5ct plugin

QEGLPlatformContext: Failed to create context: 3009

QOpenGLWindow::beginPaint: Failed to create context

QOpenGLWindow::beginPaint: Failed to make context current

Traceback (most recent call last):

  File "my_code.py", line 68, in initializeGL

    self.gl = self.context().versionFunctions()

AttributeError: module 'PyQt5._QOpenGLFunctions_ES2' has no attribute 'QOpenGLFunctions_ES2'

Aborted

任何指导如何克服这个问题？非常感激。提前致谢。

PS代码在Win10上运行流畅。因此，代码本身一定没有问题。 （Win10上的环境为：numpy=1.14.3；numpy-stl=2.5.0；pyqt5=5.10.1；sip=4.19.8；六=1.11.0；python=3.6.0；python-utils=2.3 .0)

Answer 1

也许你可以尝试重新安装 pyqt5 来解决这个问题。看看是否有线程占用 pip/pyqt5/qmake.exe。 或者看你的GPU，是OpenGL2.0还是更高版本？

你说问题是由 “self.gl=self.context().versionFunctions()” 而且我在扭一个例子，你可以试试：

import sys import math from PyQt5.QtCore import pyqtSignal, QPoint, QSize, Qt from PyQt5.QtGui import QColor from PyQt5.QtWidgets import (QApplication, QHBoxLayout, QOpenGLWidget, QSlider, QWidget) import OpenGL.GL as gl class Window(QWidget): def __init__(self): super(Window, self).__init__() self.glWidget = GLWidget() self.xSlider = self.createSlider() self.ySlider = self.createSlider() self.zSlider = self.createSlider() self.xSlider.valueChanged.connect(self.glWidget.setXRotation) self.glWidget.xRotationChanged.connect(self.xSlider.setValue) self.ySlider.valueChanged.connect(self.glWidget.setYRotation) self.glWidget.yRotationChanged.connect(self.ySlider.setValue) self.zSlider.valueChanged.connect(self.glWidget.setZRotation) self.glWidget.zRotationChanged.connect(self.zSlider.setValue) mainLayout = QHBoxLayout() mainLayout.addWidget(self.glWidget) mainLayout.addWidget(self.xSlider) mainLayout.addWidget(self.ySlider) mainLayout.addWidget(self.zSlider) self.setLayout(mainLayout) self.xSlider.setValue(15 * 16) self.ySlider.setValue(345 * 16) self.zSlider.setValue(0 * 16) self.setWindowTitle("Hello GL") def createSlider(self): slider = QSlider(Qt.Vertical) slider.setRange(0, 360 * 16) slider.setSingleStep(16) slider.setPageStep(15 * 16) slider.setTickInterval(15 * 16) slider.setTickPosition(QSlider.TicksRight) return slider class GLWidget(QOpenGLWidget): xRotationChanged = pyqtSignal(int) yRotationChanged = pyqtSignal(int) zRotationChanged = pyqtSignal(int) def __init__(self, parent=None): super(GLWidget, self).__init__(parent) self.object = 0 self.xRot = 0 self.yRot = 0 self.zRot = 0 self.lastPos = QPoint() self.trolltechGreen = QColor.fromCmykF(0.40, 0.0, 1.0, 0.0) self.trolltechPurple = QColor.fromCmykF(0.39, 0.39, 0.0, 0.0) def getOpenglInfo(self): info = """ Vendor: {0} Renderer: {1} OpenGL Version: {2} Shader Version: {3} """.format( gl.glGetString(gl.GL_VENDOR), gl.glGetString(gl.GL_RENDERER), gl.glGetString(gl.GL_VERSION), gl.glGetString(gl.GL_SHADING_LANGUAGE_VERSION) ) return info def minimumSizeHint(self): return QSize(50, 50) def sizeHint(self): return QSize(400, 400) def setXRotation(self, angle): angle = self.normalizeAngle(angle) if angle != self.xRot: self.xRot = angle self.xRotationChanged.emit(angle) self.update() def setYRotation(self, angle): angle = self.normalizeAngle(angle) if angle != self.yRot: self.yRot = angle self.yRotationChanged.emit(angle) self.update() def setZRotation(self, angle): angle = self.normalizeAngle(angle) if angle != self.zRot: self.zRot = angle self.zRotationChanged.emit(angle) self.update() def initializeGL(self): print(self.getOpenglInfo()) self.setClearColor(self.trolltechPurple.darker()) self.object = self.makeObject() gl.glShadeModel(gl.GL_FLAT) gl.glEnable(gl.GL_DEPTH_TEST) gl.glEnable(gl.GL_CULL_FACE) def paintGL(self): gl.glClear( gl.GL_COLOR_BUFFER_BIT | gl.GL_DEPTH_BUFFER_BIT) gl.glLoadIdentity() gl.glTranslated(0.0, 0.0, -10.0) gl.glRotated(self.xRot / 16.0, 1.0, 0.0, 0.0) gl.glRotated(self.yRot / 16.0, 0.0, 1.0, 0.0) gl.glRotated(self.zRot / 16.0, 0.0, 0.0, 1.0) gl.glCallList(self.object) def resizeGL(self, width, height): side = min(width, height) if side 360 * 16: angle -= 360 * 16 return angle def setClearColor(self, c): gl.glClearColor(c.redF(), c.greenF(), c.blueF(), c.alphaF()) def setColor(self, c): gl.glColor4f(c.redF(), c.greenF(), c.blueF(), c.alphaF()) if __name__ == '__main__': app = QApplication(sys.argv) window = Window() window.show() sys.exit(app.exec_())

在尝试这个例子之前，请运行这个命令（安装 pyOpenGL）： 点安装 pyOpenGL