robotframework 随机选中下拉框中的值

示例脚本：

click element id=provinceName #点击地区 省
wait until element is enabled xpath=.//*[@id='provinceNameDataGrid']/tbody/tr #等待 省份下拉框的出现
${count1} get matching xpath count xpath=.//*[@id='provinceNameDataGrid']/tbody/tr #获取省份下拉值的数量
${s1} evaluate random.randint(1,${count1}) random #随机一个数值
click element xpath=.//*[@id='provinceNameDataGrid']/tbody/tr[${s1}]/td #点击随机后的省份（路径中用了上面的随机数字）
sleep 0.2
${count2} get matching xpath count xpath=.//*[@id='cityNameDataGrid']/tbody/tr #获取 市 下拉值的数量
${s2} evaluate random.randint(1,${count2}) random #随机一个数值
click element xpath=.//*[@id='cityNameDataGrid']/tbody/tr[${s2}]/td
sleep 0.2
${count3} get matching xpath count xpath=.//*[@id='districtNameDataGrid']/tbody/tr #获取 县/区 下拉值的数量
${s3} evaluate random.randint(1,${count3}) random #随机一个数值
click element xpath=.//*[@id='districtNameDataGrid']/tbody/tr[${s3}]/td