标签：use mozilla parent eve 运行时 输出 sdn form one
例一：蒙特卡罗方法求解 π 值
1 from random import random 2 from math import sqrt 3 from time import clock 4 DARTS=1000 5 hits=0.0 6 clock() 7 for i in range(1,DARTS+1): 8 x,y=random(),random() 9 dist=sqrt(x**2+y**2) 10 if dist<=1.0: 11 hits=hits+1 12 pi=4*(hits/DARTS) 13 print("pi值是{}.".format(pi)) 14 print("运行时间是：{:5.5}s".format(clock()))
运行结果：pi值是3.216.
运行时间是：0.0034431s
[Finished in 0.5s]
例二：贵阳天气：
原文：https://blog.csdn.net/weixin_42358077/article/details/95188483
import requests
from bs4 import BeautifulSoup
import re
def get_page(url):
try:
kv = {‘user-agent‘:‘Mozilla/5.0‘}
r = requests.get(url,headers = kv)
r.raise_for_status()
r.encoding = r.apparent_encoding
return r.text
except:
return ‘错误‘
def parse_page(html, return_list):
soup = BeautifulSoup(html, ‘html.parser‘)
day_list = soup.find(‘ul‘, ‘t clearfix‘).find_all(‘li‘)
for day in day_list:
date = day.find(‘h1‘).get_text()
wea = day.find(‘p‘, ‘wea‘).get_text()
if day.find(‘p‘, ‘tem‘).find(‘span‘):
hightem = day.find(‘p‘, ‘tem‘).find(‘span‘).get_text()
else:
hightem = ‘‘
lowtem = day.find(‘p‘, ‘tem‘).find(‘i‘).get_text()
win = re.findall(‘(?<= title=").*?(?=")‘, str(day.find(‘p‘,‘win‘).find(‘em‘)))
wind = ‘-‘.join(win)
level = day.find(‘p‘, ‘win‘).find(‘i‘).get_text()
return_list.append([date, wea, lowtem, hightem, wind, level])
#return return_list
def print_res(return_list):
tplt = ‘{0:<10}\t{1:^10}\t{2:^10}\t{3:{6}^10}\t{4:{6}^10}\t{5:{6}^5}‘
print(tplt.format(‘日期‘, ‘天气‘, ‘最低温‘, ‘最高温‘, ‘风向‘, ‘风力‘,chr(12288)))
for i in return_list:
print(tplt.format(i[0], i[1],i[2],i[3],i[4],i[5],chr(12288)))
def main():
url = ‘http://www.weather.com.cn/weather/101260101.shtml‘
html = get_page(url)
wea_list = []
parse_page(html, wea_list)
print_res(wea_list)
if __name__ == ‘__main__‘:
main()
运行结果：
例三：输出标题：
1 import requests 2 from bs4 import BeautifulSoup 3 r=requests.get(‘http://www.baidu.com‘) 4 r.encoding=None 5 result=r.text 6 bs=BeautifulSoup(result,‘html.parser‘) 7 print(bs.title.text)
运行结果：
百度一下，你就知道
[Finished in 1.6s]
标签：use mozilla parent eve 运行时 输出 sdn form one
原文地址：https://www.cnblogs.com/Wang1107/p/11814117.html
