Instant close plot - Code inside

[Mihai Dimoiu]

Hello everyone!

I am writing my problem, my big thank you for your time and help.

So, here is it:

I am creating a GraphicsPlot object, then I add a plot, then I plot pen style with plot(pen='y'). And I have a function which setData in the window created. But this windows closes very fast.

My quest is: How can I keep the plotting window active ?

Here is the code:

from PyQt5.QtWidgets import QApplication, QMainWindow, QPushButton

import sys

import pyqtgraph as pg

class GraphPlot(object):

    def __init__(self, title = "Default window title", size_x= 640, size_y = 480):

        

        self.win = pg.GraphicsWindow()

        self.win.resize(size_x, size_y)

        self.win.setWindowTitle(title)

        

        self.graf = self.win.addPlot()

        

        self.curve = self.graf.plot(pen='y')

        

        self.win.show()

        

    def plot(self, data_x):

        self.curve.setData(data_x)

        

        

class AnalyzerApp(QMainWindow):

    def __init__(self):

        super().__init__()

        self.left = 10

        self.top = 10

        self.title = "Title"

        self.width = 1170

        self.height = 720

        self.initUI()

        

    def initUI(self):  

        self.setGeometry(self.left,self.top,self.width,self.height)

        self.setWindowTitle(self.title)

        

        self.btn = QPushButton("Button", self)

        self.btn.move(500, 500)

        self.btn.clicked.connect(self.fxn1) 

        self.show()

        

    def fxn1(self):

        import random

        graf = GraphPlot()

        data = random.sample(range(1,100),3)

        print(data)

        graf.plot(data)

        

if __name__ == '__main__':

    app = QApplication(sys.argv)

    ex = AnalyzerApp()

    sys.exit(app.exec_())

        

Thank you very much!