How to use the pyzotero.zotero.__version__.split function in pyzotero

def check_requirements ():
    try:
        v = float("%d.%02d%02d" % tuple(map(int, zotero.__version__.split(r'.'))))
        if v < 1.0103:
            warning("Pyzotero version is incompatible.  Upgrade to 1.1.3 or later.")
            sys.exit(1)
    except SystemExit as e:
        raise e
    except:
        warning("Pyzotero version could not be validated. 1.1.3 or later required.")