我想测试juptyerlab的补丁实现。我希望使用硒在代码单元中执行"hello world"。到目前为止，我可以登录并创建一个新笔记本：
from selenium import webdriver
driver = webdriver.Firefox()
# assume jupyterlab is running and serving on localhost at port 8888
driver.get("http://localhost:8888")
elem = driver.find_element_by_id("password_input")
password = ""
elem.send_keys(password)
elem = driver.find_element_by_id("login_submit")
elem.click()
elem = driver.find_element_by_css_selector(".jp-Launcher-cwd+ .jp-Launcher-section .jp-LauncherCard")
elem.click()
这将创建一个新的笔记本，但是现在我只能在单元格中输入一些代码并运行它了。如果查看页面源，则看不到单元格的任何html元素。但是，如果我在一个单元格中输入print("test")，则driver.page_source包含此内容（它也嵌套在我也省略了的其他内容中）：
<div class="CodeMirror cm-s-jupyter CodeMirror-wrap jp-mod-readOnly">
<div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 0px;">
<textarea
style="position: absolute; bottom: -1em; padding: 0px; width: 1px; height: 1em; outline: currentcolor none medium;"
autocorrect="off" autocapitalize="off"
spellcheck="false" tabindex="0"
wrap="off"></textarea></div>
<div class="CodeMirror-vscrollbar" tabindex="-1"
cm-not-content="true"
style="display: block; bottom: 0px;">
<div style="min-width: 1px; height: 33px;"></div>
</div>
<div class="CodeMirror-hscrollbar" tabindex="-1"
cm-not-content="true">
<div style="height: 100%; min-height: 1px; width: 0px;"></div>
</div>
<div class="CodeMirror-scrollbar-filler"
cm-not-content="true"></div>
<div class="CodeMirror-gutter-filler"
cm-not-content="true"></div>
<div class="CodeMirror-scroll" tabindex="-1" draggable="true">
<div class="CodeMirror-sizer"
style="margin-left: 0px; padding-right: 0px; padding-bottom: 0px;">
<div style="position: relative;">
<div class="CodeMirror-lines" role="presentation">
<div style="position: relative; outline: currentcolor none medium;"
role="presentation">
<div class="CodeMirror-measure">
<pre><span>xxxxxxxxxx</span></pre>
</div>
<div class="CodeMirror-measure">
<pre class="CodeMirror-line"
role="presentation"><span
role="presentation"><span
class="cm-builtin">print</span>(<span
class="cm-string">"test"</span>)</span></pre>
</div>
<div style="position: relative; z-index: 1;"></div>
<div class="CodeMirror-cursors"></div>
<div class="CodeMirror-code"
role="presentation"></div>
</div>
</div>
</div>
</div>
<div style="position: absolute; height: 30px; width: 1px; border-bottom: 0px solid transparent;"></div>
<div class="CodeMirror-gutters"
style="display: none;"></div>
</div>
</div>
我可以看到print("text")的文本在哪里（即上面的html代码段中最深的嵌套元素），但是我无法弄清楚这里可以向其中发送文本或发送密钥的元素
我遇到了robotframework-jupyterlibrary，它有一些线索，例如this和this 。从这些链接中我看到了
${JLAB CSS ACTIVE INPUT} ${JLAB CSS ACTIVE CELL} .CodeMirror
和
Add and Run JupyterLab Code Cell
[Arguments] ${code}=print("hello world")
[Documentation] Add a ``code`` cell to the currently active notebook and run it.
Click Element css:${JLAB CSS NB TOOLBAR} ${JLAB CSS ICON ADD}
Sleep 0.1s
${cell} = Get WebElement css:${JLAB CSS ACTIVE INPUT}
Click Element ${cell}
Set CodeMirror Value ${JLAB CSS ACTIVE INPUT} ${code}
Run Current JupyterLab Code Cell
Click Element ${cell}
这让我想到如果我选择.CodeMirror元素，那么我只需要弄清楚Get WebElement在这种奇怪语言中的作用以及如何在硒中进行。
有什么想法吗？
我也尝试过（基于https://stackoverflow.com/a/48723135/1011724和https://stackoverflow.com/a/50279295/1011724）：
from selenium.webdriver.common.action_chains import ActionChains
actions = action_chains.ActionChains(driver)
textarea = driver.find_elements_by_css_selector('.CodeMirror textarea')[0] # tried for [0], [1] ,[2] and [3] which is all of them.
actions.move_to_element(textarea).click().send_keys("testing...").perform()
但我不断收到错误消息
selenium.common.exceptions.WebDriverException：消息：TypeError：rect未定义
答案 0 :(得分：4)
要打开Jupyter笔记本：
打开命令窗口并导航到存储库文件夹，或者打开anaconda-command-prompt窗口并执行
jupyter notebook --NotebookApp.token='' --NotebookApp.password='' 使用driver.get("http://localhost:8888")加载笔记本后，这是最棘手的部分，即如何选择Dynamically changing object。访问参考：Dynamically Changing IDs。
- 使用
find_element_by_xpath- 使用
find_element_by_css_selector
这两个都将为您提供相同的选择点，但是最好使用Xpath，这是更方便的技术。您可以像这样前进；
import time
from selenium import webdriver
from selenium.webdriver.support.wait import WebDriverWait
driver = webdriver.Chrome('chromedriver.exe')
wait = WebDriverWait(driver, 20)
driver.maximize_window()
website_url = "http://localhost:8888/"
driver.get(website_url)
# Using Xpath
# I prefer using xpath, because it is simple to understand
# and if you want to dynamically enter data into fields, it would be an awesome approach
driver.find_element_by_xpath("//div[@id='new-buttons']").click()
if len(driver.find_elements_by_xpath("//div[@id='new-buttons']//li[@id='kernel-python3']")) > 0:
time.sleep(3)
driver.find_element_by_xpath("//div[@id='new-buttons']//li[@id='kernel-python3']").click()
driver.find_element_by_xpath('//div[@class="cell code_cell rendered selected"]').click()
# Using css_selector
#driver.find_element_by_css_selector("#notebook-container > div").click()
command = 'print("Hello World!")'
#a = driver.find_element_by_css_selector("#notebook-container > div > div.input > div.inner_cell >"
# "div.input_area > div > div:nth-child(1) > textarea")
time.sleep(3)
# To select Note-Book text-area and place command in it.
a = driver.find_element_by_xpath('//div[@class="input_area"]//textarea').click().send_keys(command)
# To run the Code in Selected Cell
time.sleep(3)
driver.find_element_by_xpath("//button[@title='Run']").click()
print("Test is done.")
答案 1 :(得分：4)
下面的代码已使用Chrome，Firefox和jupyterlab最新版本进行了测试：
from selenium import webdriver
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.support.wait import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.common.by import By
driver = webdriver.Chrome()
wait = WebDriverWait(driver, 10)
driver.get("http://localhost:8888")
token = "0107216930d05db8a7c36ad6a73573dd5349c3dd56fee852"
wait.until(EC.element_to_be_clickable((By.ID, "password_input"))).send_keys(token, Keys.ENTER)
# wait for "Python 3" Notebook menu or CodeMirror element if already launched.
wait.until(EC.presence_of_element_located(
(By.CSS_SELECTOR, "[title='Python 3'][data-category='Notebook'], .jp-Notebook .CodeMirror")))
# if "Python 3" Notebook menu found click to open new Notebook
if len(driver.find_elements_by_css_selector("[title='Python 3'][data-category='Notebook']")) > 0:
driver.find_element_by_css_selector("[title='Python 3'][data-category='Notebook']").click()
# wait for CodeMirror and click to focus
code_mirror = wait.until(EC.presence_of_element_located((By.CSS_SELECTOR, ".jp-Notebook .CodeMirror")))
code_mirror.click()
code_mirror.find_element_by_tag_name("textarea").send_keys("print('Hello World!')")
driver.find_element_by_css_selector("[data-icon='run']").click()
output = wait.until(EC.visibility_of_element_located((By.CSS_SELECTOR, ".jp-OutputArea-output")))
print(output.text)
assert output.text.strip() == "Hello World!"
driver.quit()