如何循环浏览并单击相关项目

Question

下面我有四个单选按钮，每个按钮选择一个乘客。

<input checked="checked" name="passenger" id="passenger-0" data-passengerindex="0" type="radio">
    <input checked="checked" name="passenger" id="passenger-1" data-passengerindex="1" type="radio">
    <input checked="checked" name="passenger" id="passenger-2" data-passengerindex="2" type="radio">
    <input checked="checked" name="passenger" id="passenger-3" data-passengerindex="3" type="radio">

下面是一个代码块，显示了一排座位(在第6行)，一些婴儿座位(class="seat infant")和其他普通座位(普通座位是非婴儿座椅- class="seat noinfant"和座椅class="seat"。

​

    <td>
        <a href="#6A" title="Seat Suitable for Infants 6A" data-seat="6A" data-seatid="81374518" data-seatgroup="0" class="seat  infant" data-personid="" data-infantseat="True">
            <span>Seat Suitable for Infants 6A</span>
        </a>
    </td><td>
        <a href="#6B" title="Seat Suitable for Infants 6B" data-seat="6B" data-seatid="81374519" data-seatgroup="0" class="seat  infant" data-personid="" data-infantseat="True">
            <span>Seat Suitable for Infants 6B</span>
        </a>
    </td>
    <td>
        <a href="#6C" title="Seat Suitable for Infants 6C" data-seat="6C" data-seatid="81374520" data-seatgroup="0" class="seat  infant" data-personid="" data-infantseat="True">
            <span>Seat Suitable for Infants 6C</span>
        </a>
    </td>
        <td class="aisle">6</td>
    <td>
        <a href="#6D" title="Seat Suitable for Infants 6D" data-seat="6D" data-seatid="81374522" data-seatgroup="1" class="seat  noinfant" data-personid="" data-infantseat="True">
            <span>Seat Suitable for Infants 6D</span>
        </a>
    </td>
    <td>
        <a href="#6E" title="Seat Suitable for Infants 6E" data-seat="6E" data-seatid="81374523" data-seatgroup="1" class="seat" data-personid="" data-infantseat="True">
            <span>Seat Suitable for Infants 6E</span>
        </a>
    </td>
    <td>
        <a href="#6F" title="Seat Suitable for Infants 6F" data-seat="6F" data-seatid="81374524" data-seatgroup="1" class="seat  infant" data-personid="" data-infantseat="True">
            <span>Seat Suitable for Infants 6F</span>
        </a>
    </td>
</tr>

当选择一个座位时，会发生以下情况：

• 婴儿座位从class="seat infant"到class="seat infant reserved selected的类更改
• 普通座位- class="seat noinfant"到class="seat noinfant reserved selected或class="seat"到class="seat reserved selected

下面是我需要帮助实现的内容：

从第一排开始，继续前进

• 对于前两名乘客，单击下一个可用的婴儿座椅(每个婴儿座位一名乘客)
• 对于最后两位乘客，请单击从第1排开始的任何座位。

我们不需要实际选择乘客，因为他们被自动选择后，选择一个座位，第一个乘客已经选择时，页面被加载。

像我这样只使用Python 4天的人，有没有人知道如何实现上面的内容？

Answer 1

这样做的目的是：

• 根据乘客是否有婴儿( data-hasinfant属性)，决定选择哪个座位
• 使用CSS类选择器与not()一起到达非选定和非预定座位。

抽样实施情况：

for passenger in driver.find_elements_by_css_selector("ol.passengerlist li[data-personid]"):
    passenger.click()

    has_infant = passenger.get_attribute("data-hasinfant")

    # choose seats
    if has_infant:
        # select a non-selected infant seat
        seat = driver.find_element_by_css_selector(".planebody a.seat.infant:not(.reserved):not(.selected)")
    else:
        # select a non-reserved non-selected seat
        seat = driver.find_element_by_css_selector(".planebody a.seat:not(.reserved):not(.selected)")

    print("Passenger: %s, choosing seat: %s" % (passenger.text.strip(), seat.get_attribute("data-seat")))
    seat.click()