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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def main():
 """Simple test."""

    from spyder.utils.qthelpers import qapplication
    app = qapplication()
    widget = NotebookClient(plugin=None, name='')
    widget.show()
    widget.set_url('http://google.com')
    sys.exit(app.exec_())