Python Qt6 : using the py3Dmol .

NOTE : hacker provider ... :

Simple example with the py3Dmol:

import os
import sys

from PyQt6.QtWidgets import QApplication, QWidget, QVBoxLayout
from PyQt6.QtWebEngineWidgets import QWebEngineView
from PyQt6.QtCore import QUrl
import py3Dmol

SEROTONIN_SMILES = "C1=CC2=C(C=C1)C(=CN2)CCN"

def generate_html(smiles):
    view = py3Dmol.view(width=800, height=600)
    view.addModel(smiles, "smiles")
    view.setStyle({"stick": {}})
    view.zoomTo()
    return view._make_html()

class MoleculeViewer(QWidget):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("Structura 3D – Serotonină")

        layout = QVBoxLayout(self)
        self.browser = QWebEngineView()

        html = generate_html(SEROTONIN_SMILES)

        # IMPORTANT: QUrl, nu string!
        self.browser.setHtml(html, baseUrl=QUrl("https://localhost/"))

        layout.addWidget(self.browser)

if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = MoleculeViewer()
    window.resize(900, 700)
    window.show()
    sys.exit(app.exec())