pip install PySide2 altair vega_datasets

Pyside2_altair.py

from PySide2.QtWidgets import *
from PySide2.QtCore import *
from PySide2.QtGui import *
from PySide2.QtWebEngineWidgets import QWebEngineView, QWebEngineSettings
import sys

import altair as alt
import pandas as pd
from vega_datasets import data


class VegaWidget(QWebEngineView):
    """docstring for ClassName"""

    def __init__(self, parent=None):
        super().__init__(parent)

    def plot(self):
        source = data.cars()

        chart = (
            alt.Chart(source)
            .mark_circle(size=60)
            .encode(
                x="Horsepower",
                y="Miles_per_Gallon",
                color="Origin",
                tooltip=["Name", "Origin", "Horsepower", "Miles_per_Gallon"],
            )
            .properties(width=self.width() - 100, height=self.height() - 100)
            .interactive()
        )

        self.setHtml(chart.to_html())


if __name__ == "__main__":

    app = QApplication(sys.argv)

    w = VegaWidget()
    w.plot()
    w.show()
    app.exec_()

pip install PySide2 altair vega_datasets