Simple QMainWindow plotting example

MainWindowGUI.ui

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>MainWindowGUI</class>
 <widget class="QMainWindow" name="MainWindowGUI">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>800</width>
    <height>600</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>MainWindow</string>
  </property>
  <widget class="QWidget" name="centralwidget">
   <layout class="QGridLayout" name="gridLayout">
    <item row="0" column="0">
     <layout class="QHBoxLayout" name="horizontalLayout">
      <item>
       <widget class="QPushButton" name="pushButton">
        <property name="text">
         <string>PushButton</string>
        </property>
       </widget>
      </item>
      <item>
       <spacer name="horizontalSpacer">
        <property name="orientation">
         <enum>Qt::Horizontal</enum>
        </property>
        <property name="sizeHint" stdset="0">
         <size>
          <width>40</width>
          <height>20</height>
         </size>
        </property>
       </spacer>
      </item>
     </layout>
    </item>
    <item row="1" column="0">
     <widget class="GraphicsLayoutWidget" name="graphicsView"/>
    </item>
   </layout>
  </widget>
  <widget class="QMenuBar" name="menubar">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>800</width>
     <height>20</height>
    </rect>
   </property>
  </widget>
  <widget class="QStatusBar" name="statusbar"/>
  <widget class="QToolBar" name="toolBar">
   <property name="windowTitle">
    <string>toolBar</string>
   </property>
   <attribute name="toolBarArea">
    <enum>TopToolBarArea</enum>
   </attribute>
   <attribute name="toolBarBreak">
    <bool>false</bool>
   </attribute>
  </widget>
 </widget>
 <customwidgets>
  <customwidget>
   <class>GraphicsLayoutWidget</class>
   <extends>QGraphicsView</extends>
   <header>pyqtgraph</header>
  </customwidget>
 </customwidgets>
 <resources/>
 <connections/>
</ui>

run.py

import sys
from PyQt5 import QtCore, QtGui, uic
import pyqtgraph as pq

qtCreatorFile = "MainWindowGUI.ui" # Enter file here.

Ui_MainWindow, QtBaseClass = uic.loadUiType(qtCreatorFile)

class MyApp(QtGui.QMainWindow, Ui_MainWindow):
    def __init__(self):
        QtGui.QMainWindow.__init__(self)
        Ui_MainWindow.__init__(self)
        self.setupUi(self)

        self.dataplot = self.graphicsView.addPlot(title="My Data")
        self.pushButton.clicked.connect(self.btn_clk)

    def btn_clk(self):
        L = [1,2,3,4,5]
        self.dataplot.plot(L)

if __name__ == "__main__":
    app = QtGui.QApplication(sys.argv)
    window = MyApp()
    window.show()
    sys.exit(app.exec_())

hi friend, I run the run.py but something wrong like this ---- TypeError: isdeleted() argument 1 must be sip.simplewrapper, not GraphicsLayoutWidget, did you have the same problem? @ @

Hi @phoenixsun2008, sorry about that. I'm not able to reproduce this issue you're having. I just downloaded this gist from 4 years ago and it works exactly as it did then. Can you provide any info about your environment? Here's the output of my pip freeze

numpy==1.20.0
PyQt5==5.15.2
PyQt5-sip==12.8.1
pyqtgraph==0.11.1