SSPU宋光玉：新型PPTC热敏电阻元件性能研究

SQLAssignment for Chapter 3

miltech_brand_book_大厂VI品牌视觉标准设计规范_企业品牌手册.pdf

编写程序，显示各公司年销量是否快速增长的情况（本题设年销量增长率均超过30%为快速增长），程序运行结果如图12-7所示。现给出部分程序代码，请根据题目要求进行编程。 #编程12-1 求手机销量统计 def isBigGrowth(L,rate): #判断手机销量是否快速增长 ？？？此处进行编程 print ("手机公司 是否快速增长?") data=[] #打开文件并注明文件编码格式 with open("smartPhone.txt",encoding="gbk") as f: data=f.readlines() del data[0] #删除第1行的标题内容 for company in data: #对每行内容进行遍历 company=company.split() #将手机公司名称排除在外，只对销售数据进行处理 for i in range(1,len(company)): company[i]=float(company[i]) #对company列表进行判断 if isBigGrowth(company[1:],30/100): #company[]列表做实参 print ("%s\t%s"%(company[0],"快速")) else: print ("%s\t%s"%(company[0],"否"))

import company import requests import json url = 'https://www.icourse163.org/web/j/channelBean.listMocChannelCategoryRel.rpc?csrfKey=e12649d887274cd489aaef60a7557e4a' r = requests.get(url) content = json.loads(r.text) print(content) result = None if result: for company_id in content['result']: id1 = company['id'] print(id1) 如何解决上述代码出现的错误

请为以下代码每行代码作注释 import requests import re headers ={ 'User-Agent': 'Mz1lla/5.e (Mindows NT 10.8; win64; x64) Chrome/69.0.3497.100 Safani/537.36'} def baidu(company,page): num = (page - 1) * 18 url = 'https://www.baidu.com/s?tn=news&rtt=4&bsst=1&cl=2&wd'+ company +'&pn='+ str(num) res = requests.get(url, headers =headers).text p_info = '

(.*?)

' info = re.findall(p_info,res, re.S) p_href = '

.*?<a href="(.*?)"' href = re.findall(p_href,res, re.S) p_title = '<h3 class="c-title“>.*?>(.*?)</a>' title = re.findall(p_title,res, re.S) source = [] date = [] for i in range(len(info): title[i] = title[i].strip() title[i] = re.sub('<.*?>,,title[i]) info[i] = re.sub('<.*?>', info[i]) source.append(info[i].split('  ')[0]) date.append(info[i].split( '  ')[1]) source[i] = source[i].strip() date[i] =date[i].strip() print(str(i + 1)+'.'+ title[i]+'('+ date[i] +'-'+ source[i] + ')') print(href[i]) companys = ['华能信托', '阿里巴巴', '万科集团', '百度集团', '腾讯'，'京东'] for company in companys: for i in range(20): baidu(company,i+1) print(company+'第'+str(i+1)+'页爬取成功')

创建Company类和Employee类，在Company类中添加Employee属性和name属性

company_finance5 = {'company': ['ant', 'cainiao', 'taobao'], 'assets':[280, 120, 360], 'liabilities':[200, 80, 260], 'incomes':[300,180, 320], 'costs':[200,220, 180], 'stock_prices':[10, 12, 18], 'tax_rates':[0.12, 0.08, 0.01]} company_finance6 = {'company': ['clouds', 'cainiao', 'blockchain'], 'assets':[340, 120, np.nan], 'liabilities':[320, 80, 120], 'incomes':[400,180, 280], 'costs':[300,220, 180], 'stock_prices':[22, 12, 18], 'tax_rates':[0.15, 0.08, 0.13]} company_finance7 = {} company_finance7[key].extend(company_finance5[key]) company_finance7[key].extend(company_finance6[key]) company_finance7这段代码输出错误的原因

创建Company类和Employee类，在Company类中添加Employee属性和name属性,在Employee类中添加name属性，在数据库创建Company表和Employee表,通过MyBatis查询id为1的Company类的信息（Company类中需要含有所属的Employee类的列表

print(city_list[i],company_list[i],jobname_list[i],salary_list[i],worktime_list[i])将print中的内容存入文件

import requests from bs4 import BeautifulSoup codes = ['600887', '002027'] # 伊利股份的股票代码为600887，分众传媒的股票代码为002027 for code in codes: url = f'http://www.sse.com.cn/assortment/stock/list/info/quote/index.shtml?COMPANY_CODE={code}' response = requests.get(url) soup = BeautifulSoup(response.content, 'html.parser') name = soup.find('div', class_='company_info').find('h2').text price = soup.find('span', class_='last').text print(f'{name} 的股价为 {price}') 执行以上代码报一下错误 File "D:\xbro\Blili\kk2.py", line 12, in <module> name = soup.find('div', class_='company_info').find('h2').text AttributeError: 'NoneType' object has no attribute 'find' 根据报错修改代码