Python crashing when running a PyQt5 application
Question
I am building a application with the backend done in python and the front end done in QML using PyQt5. When I run my application sometimes it runs with no problem but 80% of the time python crashes. When it crashed this message will be shown, Process finished with exit code -1073741819 (0xC0000005).
I have figured out that it crashes at this point in main: engine.rootContext().setContextProperty("con", main) It seems like when it tries to connect to the backend connections in my main QML file it fails. Does anyone know why this may be?
This is my main file:
# This Python file uses the following encoding: utf-8
import sys
import os
import threading
import time
from PySide2.QtGui import QGuiApplication
from PySide2.QtQml import QQmlApplicationEngine
from PySide2.QtCore import QObject, Signal, Slot, QTimer
from python_files.GetSearchResults import GetSearchResults
from python_files.StreamQueue import StreamQueue
from python_files.StreamGenerator import StreamGenerator
from python_files.DatabaseHelper import DatabaseHelper
class MainWindow(QObject):
def __init__(self):
QObject.__init__(self)
self.timer = QTimer()
self.timer.timeout.connect(lambda: self.update_progress())
self.timer.start(500)
self.play_img_val = 0
self.database = DatabaseHelper()
self.get_search_results = GetSearchResults()
self.stream_queue = StreamQueue(self)
self.stream_generator = StreamGenerator()
self.queue_thread = None
searchResult = Signal(int, str, str)
updateQueue = Signal(str, str, str)
setPlayer = Signal(str, str, str, str, str, str, str)
setProgress = Signal(str, float)
clearSearch = Signal()
upDatePlayImg = Signal(str)
setFavorites = Signal(str, str, str, str)
clearFavorites = Signal()
def add_stream_queue(self, stream, pos=None):
self.stream_queue.add_to_queue(stream, pos)
self.update_onscreen_queue()
def play_queue(self):
if self.stream_queue.get_first_stream():
self.queue_thread = threading.Thread(target=self.stream_queue.play_stream_queue, daemon=True)
self.queue_thread.start()
# self.update_player()
def update_player(self):
main_color, secondary_color, third_color = self.stream_queue.get_current_stream().get_colors()
track = self.stream_queue.get_current_stream().get_track()
artist = self.stream_queue.get_current_stream().get_artist()
album_art = self.stream_queue.get_current_stream().get_album_art()
length = self.stream_queue.get_current_stream().get_length()
self.setPlayer.emit(album_art.replace("https://", "http://"), track, artist, length, main_color,
secondary_color, third_color)
def update_progress(self):
# print(self.stream_queue.get_current_time(), self.stream_queue.get_percentage())
self.setProgress.emit(self.stream_queue.get_current_time(), self.stream_queue.get_percentage())
# LOWER QUALITY OF IMAGE
def update_onscreen_queue(self):
stream_queue = self.stream_queue.get_queue()
for stream in stream_queue:
self.updateQueue.emit(stream.get_album_art().replace("https://", "http://"), stream.get_track(),
stream.get_artist())
@Slot(int)
def add_to_queue(self, index):
search_result = self.get_search_results.select_result(index)
# stream = Stream(search_result.get_title(), search_result.get_link())
stream = self.stream_generator.create_stream(search_result.get_title(), search_result.get_link())
self.stream_queue.add_to_queue(stream)
# self.update_onscreen_queue()
self.updateQueue.emit(stream.get_album_art().replace("https://", "http://"), stream.get_track(),
stream.get_artist())
self.play_queue()
@Slot(str)
def add_fav_queue(self, yt_id):
print("########", yt_id)
fav_stream = self.database.get_stream(yt_id)
stream = self.stream_generator.create_db_stream(fav_stream[0], fav_stream[1], fav_stream[2], fav_stream[3],
fav_stream[4], fav_stream[5], fav_stream[6], fav_stream[7],
fav_stream[8], fav_stream[9], fav_stream[10], fav_stream[11])
self.stream_queue.add_to_queue(stream)
self.updateQueue.emit(stream.get_album_art().replace("https://", "http://"), stream.get_track(),
stream.get_artist())
self.play_queue()
@Slot(str)
def search(self, search_query):
self.get_search_results.search(search_query)
search_results = self.get_search_results.get_results()
self.clearSearch.emit()
for i in range(len(search_results)):
self.searchResult.emit(i, search_results[i].get_thumbnail(), search_results[i].get_title())
@Slot(int)
def save_stream(self, index):
# ADD Multithreading
search_result = self.get_search_results.select_result(index)
stream = self.stream_generator.create_stream(search_result.get_title(), search_result.get_link())
stream_id = self.database.get_last_id() + 1
self.database.save_stream(stream_id, stream.get_title(), stream.get_link(), stream.get_audio_url(),
stream.get_track(), stream.get_artist(), stream.get_album(), stream.get_album_art(),
stream.get_length(), stream.get_year(), stream.get_main_color(),
stream.get_second_color(), stream.get_third_color())
@Slot()
def get_favorites(self):
self.clearFavorites.emit()
favorites = self.database.get_streams()
for favorite in favorites:
self.setFavorites.emit(favorite[0], favorite[1], favorite[2], favorite[3])
@Slot(float)
def seek(self, seek_time):
# print(seek_time)
self.stream_queue.seek_to_time(seek_time)
@Slot()
def pause_stream(self):
self.stream_queue.pause_stream()
if self.play_img_val == 0:
self.play_img_val = 1
print("pause_icon")
self.upDatePlayImg.emit("pause_icon.png")
else:
self.play_img_val = 0
print("play_icon")
self.upDatePlayImg.emit("play_icon.png")
@Slot()
def prev_stream(self):
self.stream_queue.previous_stream()
# self.update_player()
@Slot()
def next_stream(self):
self.stream_queue.next_stream()
# self.update_player()
if __name__ == "__main__":
app = QGuiApplication(sys.argv)
engine = QQmlApplicationEngine()
main = MainWindow()
engine.load(os.path.join(os.path.dirname(__file__), "qml/main.qml"))
engine.rootContext().setContextProperty("con", main)
if not engine.rootObjects():
sys.exit(-1)
sys.exit(app.exec_())
This is my main QML file
import QtQuick 2.15
import QtQuick.Window 2.15
import QtQuick.Controls 2.15
import "controls"
import QtGraphicalEffects 1.0
Window {
id: mainWindow
.
.
.
flags: {
Qt.Window | Qt.FramelessWindowHint;
Qt.Window | Qt.MSWindowsFixedSizeDialogHint;
}
Rectangle {
id: mainBackground
.
.
.
}
Connections{
target: con
function onSearchResult(index, thumb, title){
//listModel.append({index: index, name: title, thumb: thumb})
}
function onUpdateQueue(albumArt, track, artist){
queueListModel.append({queueImg: albumArt, track: track, artist: artist});
}
function onSetPlayer(albumArt, track, artist, length, color1, color2, color3){
albumImg.source = albumArt;
trackTxt.text = track;
artistTxt.text = artist;
runTimeTxt.text = length;
mainColor = color1;
secondaryColor = color2;
thirdColor = color3;
}
function onSetProgress(time, precentage){
currTimeTxt.text = time;
progressBar.value = precentage;
}
function onClearSearch(){
//listModel.clear();
}
function onUpDatePlayImg(imgPath){
playBtn.image1 = imgPath;
}
function onSetFavorites(yt_id, track, artist, album_art){
//listModel.append({index: yt_id, name: track, thumb: album_art});
}
function onClearFavorites(){
//listModel.clear();
}
}
}
1 answers
solution1
0 2021-05-03 21:38:18
I am building a application with the backend done in python and the front end done in QML using PyQt5. When I run my application sometimes it runs with no problem but 80% of the time python crashes. When it crashed this message will be shown, Process finished with exit code -1073741819 (0xC0000005).
I have figured out that it crashes at this point in main: engine.rootContext().setContextProperty("con", main) It seems like when it tries to connect to the backend connections in my main QML file it fails. Does anyone know why this may be?
This is my main file:
# This Python file uses the following encoding: utf-8
import sys
import os
import threading
import time
from PySide2.QtGui import QGuiApplication
from PySide2.QtQml import QQmlApplicationEngine
from PySide2.QtCore import QObject, Signal, Slot, QTimer
from python_files.GetSearchResults import GetSearchResults
from python_files.StreamQueue import StreamQueue
from python_files.StreamGenerator import StreamGenerator
from python_files.DatabaseHelper import DatabaseHelper
class MainWindow(QObject):
def __init__(self):
QObject.__init__(self)
self.timer = QTimer()
self.timer.timeout.connect(lambda: self.update_progress())
self.timer.start(500)
self.play_img_val = 0
self.database = DatabaseHelper()
self.get_search_results = GetSearchResults()
self.stream_queue = StreamQueue(self)
self.stream_generator = StreamGenerator()
self.queue_thread = None
searchResult = Signal(int, str, str)
updateQueue = Signal(str, str, str)
setPlayer = Signal(str, str, str, str, str, str, str)
setProgress = Signal(str, float)
clearSearch = Signal()
upDatePlayImg = Signal(str)
setFavorites = Signal(str, str, str, str)
clearFavorites = Signal()
def add_stream_queue(self, stream, pos=None):
self.stream_queue.add_to_queue(stream, pos)
self.update_onscreen_queue()
def play_queue(self):
if self.stream_queue.get_first_stream():
self.queue_thread = threading.Thread(target=self.stream_queue.play_stream_queue, daemon=True)
self.queue_thread.start()
# self.update_player()
def update_player(self):
main_color, secondary_color, third_color = self.stream_queue.get_current_stream().get_colors()
track = self.stream_queue.get_current_stream().get_track()
artist = self.stream_queue.get_current_stream().get_artist()
album_art = self.stream_queue.get_current_stream().get_album_art()
length = self.stream_queue.get_current_stream().get_length()
self.setPlayer.emit(album_art.replace("https://", "http://"), track, artist, length, main_color,
secondary_color, third_color)
def update_progress(self):
# print(self.stream_queue.get_current_time(), self.stream_queue.get_percentage())
self.setProgress.emit(self.stream_queue.get_current_time(), self.stream_queue.get_percentage())
# LOWER QUALITY OF IMAGE
def update_onscreen_queue(self):
stream_queue = self.stream_queue.get_queue()
for stream in stream_queue:
self.updateQueue.emit(stream.get_album_art().replace("https://", "http://"), stream.get_track(),
stream.get_artist())
@Slot(int)
def add_to_queue(self, index):
search_result = self.get_search_results.select_result(index)
# stream = Stream(search_result.get_title(), search_result.get_link())
stream = self.stream_generator.create_stream(search_result.get_title(), search_result.get_link())
self.stream_queue.add_to_queue(stream)
# self.update_onscreen_queue()
self.updateQueue.emit(stream.get_album_art().replace("https://", "http://"), stream.get_track(),
stream.get_artist())
self.play_queue()
@Slot(str)
def add_fav_queue(self, yt_id):
print("########", yt_id)
fav_stream = self.database.get_stream(yt_id)
stream = self.stream_generator.create_db_stream(fav_stream[0], fav_stream[1], fav_stream[2], fav_stream[3],
fav_stream[4], fav_stream[5], fav_stream[6], fav_stream[7],
fav_stream[8], fav_stream[9], fav_stream[10], fav_stream[11])
self.stream_queue.add_to_queue(stream)
self.updateQueue.emit(stream.get_album_art().replace("https://", "http://"), stream.get_track(),
stream.get_artist())
self.play_queue()
@Slot(str)
def search(self, search_query):
self.get_search_results.search(search_query)
search_results = self.get_search_results.get_results()
self.clearSearch.emit()
for i in range(len(search_results)):
self.searchResult.emit(i, search_results[i].get_thumbnail(), search_results[i].get_title())
@Slot(int)
def save_stream(self, index):
# ADD Multithreading
search_result = self.get_search_results.select_result(index)
stream = self.stream_generator.create_stream(search_result.get_title(), search_result.get_link())
stream_id = self.database.get_last_id() + 1
self.database.save_stream(stream_id, stream.get_title(), stream.get_link(), stream.get_audio_url(),
stream.get_track(), stream.get_artist(), stream.get_album(), stream.get_album_art(),
stream.get_length(), stream.get_year(), stream.get_main_color(),
stream.get_second_color(), stream.get_third_color())
@Slot()
def get_favorites(self):
self.clearFavorites.emit()
favorites = self.database.get_streams()
for favorite in favorites:
self.setFavorites.emit(favorite[0], favorite[1], favorite[2], favorite[3])
@Slot(float)
def seek(self, seek_time):
# print(seek_time)
self.stream_queue.seek_to_time(seek_time)
@Slot()
def pause_stream(self):
self.stream_queue.pause_stream()
if self.play_img_val == 0:
self.play_img_val = 1
print("pause_icon")
self.upDatePlayImg.emit("pause_icon.png")
else:
self.play_img_val = 0
print("play_icon")
self.upDatePlayImg.emit("play_icon.png")
@Slot()
def prev_stream(self):
self.stream_queue.previous_stream()
# self.update_player()
@Slot()
def next_stream(self):
self.stream_queue.next_stream()
# self.update_player()
if __name__ == "__main__":
app = QGuiApplication(sys.argv)
engine = QQmlApplicationEngine()
main = MainWindow()
engine.load(os.path.join(os.path.dirname(__file__), "qml/main.qml"))
engine.rootContext().setContextProperty("con", main)
if not engine.rootObjects():
sys.exit(-1)
sys.exit(app.exec_())
This is my main QML file
import QtQuick 2.15
import QtQuick.Window 2.15
import QtQuick.Controls 2.15
import "controls"
import QtGraphicalEffects 1.0
Window {
id: mainWindow
.
.
.
flags: {
Qt.Window | Qt.FramelessWindowHint;
Qt.Window | Qt.MSWindowsFixedSizeDialogHint;
}
Rectangle {
id: mainBackground
.
.
.
}
Connections{
target: con
function onSearchResult(index, thumb, title){
//listModel.append({index: index, name: title, thumb: thumb})
}
function onUpdateQueue(albumArt, track, artist){
queueListModel.append({queueImg: albumArt, track: track, artist: artist});
}
function onSetPlayer(albumArt, track, artist, length, color1, color2, color3){
albumImg.source = albumArt;
trackTxt.text = track;
artistTxt.text = artist;
runTimeTxt.text = length;
mainColor = color1;
secondaryColor = color2;
thirdColor = color3;
}
function onSetProgress(time, precentage){
currTimeTxt.text = time;
progressBar.value = precentage;
}
function onClearSearch(){
//listModel.clear();
}
function onUpDatePlayImg(imgPath){
playBtn.image1 = imgPath;
}
function onSetFavorites(yt_id, track, artist, album_art){
//listModel.append({index: yt_id, name: track, thumb: album_art});
}
function onClearFavorites(){
//listModel.clear();
}
}
}
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