Getting black screen with error message in background "js:Uncaught TypeError: Cannot read property 'callback' of undefined

[SurinderDev]

Question

Getting black screen with error message in background "js:Uncaught TypeError: Cannot read property 'callback' of undefined
I am using python version 3.11.9

Code example

import pandas as pd
from PyQt5.QtWidgets import QApplication, QMainWindow, QVBoxLayout, QWidget

from lightweight_charts.widgets import QtChart

app = QApplication([])
window = QMainWindow()
layout = QVBoxLayout()
widget = QWidget()
widget.setLayout(layout)

window.resize(800, 500)
layout.setContentsMargins(0, 0, 0, 0)

chart = QtChart(widget)

data = [
            {"time": "2024-01-01", "open": 100, "high": 110, "low": 90, "close": 105},
            {"time": "2024-01-02", "open": 105, "high": 115, "low": 95, "close": 110},
            {"time": "2024-01-03", "open": 110, "high": 120, "low": 100, "close": 115},
        ]
df = pd.DataFrame(data)

# Set the data in the chart
chart.set(df)

layout.addWidget(chart.get_webview())

window.setCentralWidget(widget)
window.show()

app.exec()

[yeongchani]

Exactly same error. Somtimes it works but the error occured by just declaring QtChart.

[yeongchani]

Exactly same error. Somtimes it works but the error occured by just declaring QtChart.

After an error occured, all of additional function stopped works.

[SurinderDev]

Can some one please look into it

[louisnw01]

Hi,

I'm unable to reproduce with that example.