只需遍历选项卡，然后使用下面的代码
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# Store the ID of the original window
    original_window = driver.current_window_handle
    
    # Loop through until we find a new window handle
    for window_handle in driver.window_handles:
        if window_handle != original_window:
            driver.switch_to.window(window_handle)
            break

更新

如果锚链接类似于<a href="https://example.com/">click me</a>，则单击时将在当前选项卡/窗口中打开
但如果是<a href="https://example.com/" target="_blank">click me</a>，则单击时将在新选项卡中打开
查看target属性

|------------------------------------------------------------------------------------------------------|
|        Value       | Description                                                                     |
|------------------------------------------------------------------------------------------------------|
|        _blank      | Opens the linked document in a new window or tab                                |
|        _self       | Opens the linked document in the same frame as it was clicked (this is default) |
|       _parent      | Opens the linked document in the parent frame                                   |
|       _top         | Opens the linked document in the full body of the window                        |
|       framename    | Opens the linked document in the named iframe                                   |
|------------------------------------------------------------------------------------------------------|

阅读更多here