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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 get_version():
 """ Get version of pydf and wkhtmltopdf binary :return: version string """

    try:
        wk_version = _string_execute('-V')
    except Exception as e:
        # we catch all errors here to make sure we get a version no matter what
        wk_version = '%s: %s' % (e.__class__.__name__, e)
    return 'pydf version: %s\nwkhtmltopdf version: %s' % (VERSION, wk_version)