循环语句:Python中有两种主要的循环语句:for循环和while循环。 for循环:用于遍历序列(如列表、元组、字典)中的元素。语法如下: for element in sequence: # 执行针对每个元素的操作 例如: fruits = ["apple", "banana", "cherry"] for fruit in fruits: print(fruit) while循环:在指定条件为真的情况下重复执...
print(f"CPU 物理核心数: { <!-- -->cpu_count_physical}") # 获取 CPU 使用率(每隔 1 秒刷新一次) foriinrange(5):# 监控5次 cpu_percent = psutil.cpu_percent(interval=1) print(f"CPU 使用率: { <!-- -->cpu_percent}%") 这段代码展示了如何获取 CPU 的逻辑核心数、物理核心数,以及每...
In this example, theindex()method is called onmy_listwith “banana” as the argument. The method returns the index of the first occurrence of “banana” in the list, which is 1. This means “banana” is the second element in the list (since list indices start at 0). 3. Usingcount(...
print("Matched line in "+ file_path +": "+ line.strip()) # Append the tuple (collapse_ratio, tile_name, pre_count, post_count, deleted_count, file_path) to the matched_lines list matched_lines.append((collapse_ratio, tile_name, pre_count, post_count, deleted_count, file_path)) ...
How do print lists in Python? To print lists you can use looping, list comprehension, join(), and many other ways. We are often required to print the list as a string, vertically, every element as a new line etc. Advertisements
my_list=[10,20,30,40,50]print(my_list[0])# 输出10print(my_list[-1])# 输出50my_list.append(60)# 添加元素 my_list.insert(2,25)# 插入元素 del my_list[3]# 删除元素 element=my_list.pop()# 弹出末尾元素 # 切片操作 sub_list=my_list[1:3]# 获取索引1到2的元素 ...
You have seen that an element in a list can be any sort of object. That includes another list. A list can contain sublists, which in turn can contain sublists themselves, and so on to arbitrary depth.Consider this (admittedly contrived) example:...
{'width': driver_width, 'height': driver_height}) element_position = await get_element_position(browser, html_content, 'td') # 在此处使用或打印 element_position # print(element_position) for res in element_position: print(res) await browser.close() if __name__ == '__main__': with...
print('正在爬取第', str(page), '页数据') try: url = 'https://search.jd.com/Search?keyword=iPhone&ev=exbrand_Apple' driver.get(url) if page > 1: input = driver.find_element_by_xpath('//*[@id="J_bottomPage"]/span[2]/input') ...
search_input=driver.find_element(By.ID,"kw")search_input.send_keys("Python 爬虫")search_input.send_keys(Keys.RETURN)# 页面就自动跳转了 time.sleep(200)# 具体爬取内容方法后续详细讲 driver.quit() 1. 2. 3. 4. 5. 6. 7. 8.