n:int)->List[int]:"""返回序列中每隔n个元素的值"""returnself.numbers[::n]# 测试类selector=NumberSelector([0,1,2,3,4,5,6,7,8,9])result=selector.every_nth_element(3)print(result)# 输出: [0, 3, 6, 9] 1. 2. 3. 4. 5. 6. 7. 8. 9. 10
driver.get("drag_and_drop.html") #Locate circle1 element circle1 =driver.find_element_by_id("drag") #Locate circle2 element circle2 =driver.find_element_by_id("drop") #Getting offset values x_off=circle2.location.get("x") y_off=circle2.location.get("y") #PerformdragAndDropBy to c...
由于计算机上的许多工作都涉及到上网,如果你的程序能上网就太好了。网络抓取是使用程序从网络上下载和处理内容的术语。例如,谷歌运行许多网络抓取程序,为其搜索引擎索引网页。在这一章中,你将学习几个模块,这些模块使得用Python抓取网页变得很容易。 webbrowserPython 自带,打开浏览器进入特定页面。 请求从互联网下载文...
WebDriverWait(driver,10).until(EC.invisibility_of_element_located((By.CSS_SELECTOR,’#swfEveryCookieWrap’)))‘’‘判断某个元素在是否存在于dom或不可见,如果可见返回False,不可见返回这个元素’’’#注意#swfEveryCookieWrap在此页面中是一个隐藏的元素 WebDriverWait(driver,10).until(EC.element_to_be_...
(EC.invisibility_of_element_located((By.CSS_SELECTOR,'#swfEveryCookieWrap')))'''判断某个元素在是否存在于dom或不可见,如果可见返回False,不可见返回这个元素'''#注意#swfEveryCookieWrap在此页面中是一个隐藏的元素WebDriverWait(driver,10).until(EC.element_to_be_clickable((By.XPATH,"//*[@id='u1...
(locator))'''判断该frame是否可以switch进去,如果可以的话,返回True并且switch进去,否则返回False'''#注意这里并没有一个frame可以切换进去WebDriverWait(driver,10).until(EC.invisibility_of_element_located((By.CSS_SELECTOR,'#swfEveryCookieWrap')))'''判断某个元素在是否存在于dom或不可见,如果可见返回...
("password") # 点击登陆按钮 browser\ .find_element_by_css_selector("body > section > div.left_area.fl > div:nth-child(2) > form > div.input_item.btn_group.clearfix > input")\ .click() cookie_dict={} time.sleep(3) Cookies = browser.get_cookies() for cookie in Cookies: ...
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20. Consider a (6,7,8) shape array, what is the index (x,y,z) of the 100th element? 21. Create a checkerboard 8x8 matrix using the tile function 22. Normalize a 5x5 random matrix 23. Create a custom dtype that describes a color as four unsigned bytes (RGBA) ...
from random import random, randint, choice, shuffle random() # random float between 0 and 1 randint(0, 100) # random integer between 0 and 100 random_el = choice([1,2,3,4]) # select a random element from list shuffle([1,2,3,4]) # shuffles a list Datetime Module 'datetime' pr...