Connect menu action from importet modul (GUI startet via function)

[Nietzsche]

Hello,

I have the following issue and I hope someone can help me. I have the following scripts:

1.) Main script (Imports df from script 2, starts the plotter function from script 3, and passes df to it)
2.) Script for BLE communication (creates a Pandas DataFrame, df, and passes df to script 1 by importing the variable from it)
3.) Script for plotter window (plots the data from df using an integrated plotter function, to which the main script passes the data from df when it starts)

So far, everything is working fine. The plotter window was implemented using pyqtgraph. First, a GUI window was designed in QT Designer, then the widget was promoted, and the corresponding class was assigned. In the script, the UI was imported using the following line:

"uiclass, baseclass = pg.Qt.loadUiType("plotter_window.ui")"

A MainWindow was created from the uiclass, and in this class, the plotting function was defined. So far, so good. It works, and my data is plotted. However, I can only plot all the data or the first data points. When I try to plot the last data points, I get an error saying that the index was not found. Here is the code:

Works: "spo2_list = df['Red'].astype(float)"
Doesn't work: "spo2_list = df['Red'].tail(100).astype(float)"

Can someone possibly help me with this?

However, my main problem is that I don't know how to update the plotter when I click on File > Refresh in the menu at the top of the window (a menu was created using qt Designer). Can someone help me with that? I have tried various approaches, but nothing has worked so far.

[jsulm]

@Nietzsche said in Connect menu action from importet modul (GUI startet via function):

I get an error saying that the index was not found

So, did you check how many entries you actually have there?

[Nietzsche]

@jsulm Hi, i have fixed the problem. But now i want to plot an live chart via pglive, maybe someone can help ?

Here my code:

import pyqtgraph as pg
from PyQt6.QtWidgets import QMainWindow
from PyQt6 import uic
import numpy as np
from PySide6.QtGui import Qt


uiclass, baseclass = uic.loadUiType("plotter_window.ui")

class PlotterWindow(QMainWindow, uiclass):
    def __init__(self, df):
        super().__init__()
        self.plot_item = None
        self.setupUi(self)
        self.actionAktualisieren.triggered.connect(self.update_button_plotter)

    def plot(self, df):
        print("Daten des DF in Plotter Modul")
        print(df)
        spo2_list = df['Red'].astype(float) # Gibt alle Werte aus

        # spo2_list = df['Red'][:100].astype(float) #gibt die ersten 100 Werte aus
        # spo2_list = df['Red'].tail(100).astype(float) # gibt die letzten 100 Werte aus, klappt nicht

        print("spo2_list = ")
        print(spo2_list)
        print("letzte 100 Werte")
        letzte_werte = df['Red'].tail(50).astype(float)
        print(letzte_werte)
        self.plot_item = self.graphWidget.plot() # Erstellen des Graphen
        self.plot_item .setData(spo2_list)  # Aktualisieren der Daten des Graphen
        self.plot_item.setData(y=spo2_list)  # Aktualisiere die Daten des Graphen


    def update_button_plotter(self):

        # Aktualisiere den Plot mit den neuen Daten
        from safe_to_excel import df
        spo2_list = df['Red'].tail(50).astype(float)  # Gibt die letzten 100 Werte aus
        spo2_list.reset_index(drop=True, inplace=True)  # Setze den Index zurück
        self.plot_item.setData(y=np.array(spo2_list))  # Aktualisiere die Daten des Graphen
        print(df)

    def keyPressEvent(self, event):
        if event.key() == Qt.Key.Key_F5:
            self.update_button_plotter()
        else:
            super().keyPressEvent(event)

Regards

[Nafi Ullah]

Regarding the issue with plotting the last data points from the DataFrame in Python:

Check if the column exists in the DataFrame using 'Red' in df.columns.
Handle the case when the column doesn't exist.
You can follow this pattern:

if 'Red' in df.columns:
    spo2_list = df['Red'].tail(100).astype(float)
else:
    # Handle the case when the column doesn't exist
    spo2_list = None  # or any other desired handling