Python 使用selenium单击展开和折叠按钮

我有一个组，我必须选择展开图标，然后进一步展开。示例：单击用户目录，然后单击“本机目录”

我使用class方法点击“用户目录”，效果很好。但是不能再往前走了。我使用类方法，因为xpath、css选择器不起作用，并且没有元素ID

a=[]
a=driver.find_elements_by_class_name("bi-tree-view-expand-icon")
a[0].click()

唯一不同的是看到的是图像标题-展开和折叠

用户目录html代码

本机目录html代码

<div class="bi-tree-view-body-content" style="left: 0px; top: 0px; width: 197px; height: 104px;"><table class="bi-tree-view-table" style="width: 197px;" cellspacing="0"><tbody class=" focused"><tr class=" selected lead" style="height: 18px;"><td style="width: 197px; padding-left: 3px;"><nobr><img title="Collapse" class="bi-tree-view-expand-icon" alt="" src="https://hyperionqa24.cgate.com/workspace/cache/2020-02-16_11-33-04/bpmstatic/thirdparty/bindows/html/themes/Skyros/images/tree-view-minus.gif"><img class="icon" alt="" src="https://hyperionqa24.cgate.com/workspace/cache/2020-02-16_11-33-04/bpmstatic/thirdparty/bindows/html/themes/Skyros/images/tree_folder_closed.gif">User Directories</nobr></td></tr><tr style="height: 18px;"><td style="width: 197px; padding-left: 22px;"><nobr><img title="Expand" class="bi-tree-view-expand-icon" alt="" src="https://hyperionqa24.cgate.com/workspace/cache/2020-02-16_11-33-04/bpmstatic/thirdparty/bindows/html/themes/Skyros/images/tree-view-plus.gif"><img class="icon" alt="" src="https://hyperionqa24.cgate.com/workspace/cache/2020-02-16_11-33-04/bpmstatic/thirdparty/bindows/html/themes/Skyros/images/tree_folder_closed.gif">Native Directory</nobr></td></tr><tr style="height: 18px;"><td style="width: 197px; padding-left: 22px;"><nobr><img title="Expand" class="bi-tree-view-expand-icon" alt="" src="https://hyperionqa24.cgate.com/workspace/cache/2020-02-16_11-33-04/bpmstatic/thirdparty/bindows/html/themes/Skyros/images/tree-view-plus.gif"><img class="icon" alt="" src="https://hyperionqa24.cgate.com/workspace/cache/2020-02-16_11-33-04/bpmstatic/thirdparty/bindows/html/themes/Skyros/images/tree_folder_closed.gif">Honeywell</nobr></td></tr><tr style="height: 18px;"><td style="width: 197px; padding-left: 3px;"><nobr><img title="Expand" class="bi-tree-view-expand-icon" alt="" src="https://hyperionqa24.cgate.com/workspace/cache/2020-02-16_11-33-04/bpmstatic/thirdparty/bindows/html/themes/Skyros/images/tree-view-plus.gif"><img class="icon" alt="" src="https://hyperionqa24.cgate.com/workspace/cache/2020-02-16_11-33-04/bpmstatic/thirdparty/bindows/html/themes/Skyros/images/tree_folder_closed.gif">Application Groups</nobr></td></tr><tr style="height: 18px;"><td style="width: 197px; padding-left: 3px;"><nobr><img title="Expand" class="bi-tree-view-expand-icon" alt="" src="https://hyperionqa24.cgate.com/workspace/cache/2020-02-16_11-33-04/bpmstatic/thirdparty/bindows/html/themes/Skyros/images/tree-view-plus.gif"><img class="icon" alt="" src="https://hyperionqa24.cgate.com/workspace/cache/2020-02-16_11-33-04/bpmstatic/thirdparty/bindows/html/themes/Skyros/images/tree_folder_closed.gif">File System</nobr></td></tr><tr class="vertical-filler" style="height: 14px;"><td style="width: 197px;">&nbsp;</td></tr></tbody></table></div>

HTML代码

<div class="bi-tree-view-body-content" style="left: 0px; top: 0px; width: 197px; height: 104px;"><table class="bi-tree-view-table" style="width: 197px;" cellspacing="0"><tbody class=" focused"><tr class=" selected lead" style="height: 18px;"><td style="width: 197px; padding-left: 3px;"><nobr><img title="Collapse" class="bi-tree-view-expand-icon" alt="" src="https://hyperionqa24.cgate.com/workspace/cache/2020-02-16_11-33-04/bpmstatic/thirdparty/bindows/html/themes/Skyros/images/tree-view-minus.gif"><img class="icon" alt="" src="https://hyperionqa24.cgate.com/workspace/cache/2020-02-16_11-33-04/bpmstatic/thirdparty/bindows/html/themes/Skyros/images/tree_folder_closed.gif">User Directories</nobr></td></tr><tr style="height: 18px;"><td style="width: 197px; padding-left: 22px;"><nobr><img title="Expand" class="bi-tree-view-expand-icon" alt="" src="https://hyperionqa24.cgate.com/workspace/cache/2020-02-16_11-33-04/bpmstatic/thirdparty/bindows/html/themes/Skyros/images/tree-view-plus.gif"><img class="icon" alt="" src="https://hyperionqa24.cgate.com/workspace/cache/2020-02-16_11-33-04/bpmstatic/thirdparty/bindows/html/themes/Skyros/images/tree_folder_closed.gif">Native Directory</nobr></td></tr><tr style="height: 18px;"><td style="width: 197px; padding-left: 22px;"><nobr><img title="Expand" class="bi-tree-view-expand-icon" alt="" src="https://hyperionqa24.cgate.com/workspace/cache/2020-02-16_11-33-04/bpmstatic/thirdparty/bindows/html/themes/Skyros/images/tree-view-plus.gif"><img class="icon" alt="" src="https://hyperionqa24.cgate.com/workspace/cache/2020-02-16_11-33-04/bpmstatic/thirdparty/bindows/html/themes/Skyros/images/tree_folder_closed.gif">Honeywell</nobr></td></tr><tr style="height: 18px;"><td style="width: 197px; padding-left: 3px;"><nobr><img title="Expand" class="bi-tree-view-expand-icon" alt="" src="https://hyperionqa24.cgate.com/workspace/cache/2020-02-16_11-33-04/bpmstatic/thirdparty/bindows/html/themes/Skyros/images/tree-view-plus.gif"><img class="icon" alt="" src="https://hyperionqa24.cgate.com/workspace/cache/2020-02-16_11-33-04/bpmstatic/thirdparty/bindows/html/themes/Skyros/images/tree_folder_closed.gif">Application Groups</nobr></td></tr><tr style="height: 18px;"><td style="width: 197px; padding-left: 3px;"><nobr><img title="Expand" class="bi-tree-view-expand-icon" alt="" src="https://hyperionqa24.cgate.com/workspace/cache/2020-02-16_11-33-04/bpmstatic/thirdparty/bindows/html/themes/Skyros/images/tree-view-plus.gif"><img class="icon" alt="" src="https://hyperionqa24.cgate.com/workspace/cache/2020-02-16_11-33-04/bpmstatic/thirdparty/bindows/html/themes/Skyros/images/tree_folder_closed.gif">File System</nobr></td></tr><tr class="vertical-filler" style="height: 14px;"><td style="width: 197px;">&nbsp;</td></tr></tbody></table></div>

用户目录活动目录霍尼韦尔应用程序组文件系统

使用CSS选择器： -用户目录-

.selected>td:n子目录（1）>img:n子目录（1）

---

-本机目录-

.focused>tr:nth child（2）>td:nth child（1）>img:nth child（1）

如果

a[0]

是用户目录，那么

a[1]

不是本机目录吗？不，它将跳转到下一个列表。即应用程序组。请查看URL中的图像-可以粘贴完整目录树的html代码吗？也许一个不同构造的

xpath

可能会有所帮助。或者，调试并找出

a

的内容，然后选择正确的a[index]。请阅读原因。粘贴代码并正确设置格式。我们需要更多用于expando切换的周围HTML。如果

a[0]

是用户目录，那么

a[1]

是否不是本机目录？不，它将跳转到下一个列表。即应用程序组。请查看URL中的图像-可以粘贴完整目录树的html代码吗？也许一个不同构造的

xpath

可能会有所帮助。或者，调试并找出

a

的内容，然后选择正确的a[index]。请阅读原因。粘贴代码并正确格式化。我们需要更多的用于expando切换的周围HTML。