selenium模拟键盘输入-定位元素

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send_keys(Keys.BACK_SPACE)删除键BackSpace

send_keys(Keys.SPACE)空格键Space

send_keys(Keys.TAB)制表键Tab

send_keys(Keys.ESPACE)回退键Esc

send_keys(Keys.ENTER)回车键Enter

send_keys(Keys.CONTROL,‘a’)全选Ctrl+A

send_keys(Keys.CONTROL,‘c’)复制CTRL+C

send_keys(Keys.CONTROL,‘x’)剪切CTRL+X

send_keys(Keys.CONTROL,‘v’)粘贴Ctrl+V

send_keys(Keys.F1)键盘F1

send_keys(Keys.F12)键盘F12

定位元素：

根据父节点定位子节点

"//*[text()=\"国家\"]/p/input/span"

根据子节点定位父节点

"//*[text()=\"上海\"]/../../span"

"//p[text()=\"上海\"]/parent::*/parent::span"

根据兄节点定位弟节点

"//*[text()=\"上海\"]/../span[3]"

"//*[text()=\"上海\"]/following-sibling::span[2]"

根据弟节点定位兄节点

"//*[text()=\"上海\"]/../span[0]"

"//*[text()=\"上海\"]/preceding-sibling::span"

//*[contains(text(),'版本')]

//input[contains(@name,’na’)] 查找name属性中包含na关键字的页面元素

get_attribute("value")