selection-zdict.py

from zdict import zdict
from PyQt5.QtWidgets import QApplication

import sys
import signal


if __name__ == '__main__':

    signal.signal(signal.SIGINT, signal.SIG_DFL)

    app = QApplication([])
    clipboard = app.clipboard()

    def query():
        word = clipboard.text(clipboard.Selection)
        sys.argv = ['', word]
        try:
            zdict.main()
        except:
            pass

    clipboard.selectionChanged.connect(query)
    app.exec()