1.实例代码

a.预测球队比赛结果代码

 

def GameOver(a,b):   

    if a>=10 and b>=10:       

        if abs(a-b)==2:         

            return True   

    if a<10 or b<10:    

        if a==11 or b==11:           

            return True   

    else:       

        return False

 

2、使用request库的get()函数访问百度网页20次并且打印返回状态，text内容,计算text()属性和content()属性所返回网页内容的长度

 

import requests

  
response = requests.get("http://www.google.cn/")
print(type(response))
status_code = response.status_code
print(status_code)
text = response.text
print(text)
encoding = response.encoding
print(encoding)
encoding1 = response.encoding = 'utf-8'
print(encoding1)
text1 = response.text
print("text内容为:{}".format(text1))
print("\n")
print("text内容长度为:{}".format(len(text1)))
print("content内容长度为:{}".format(len(r.content)))
 
输出结果：

<class 'requests.models.Response'>
200
<!DOCTYPE html>
<html lang="zh">
<meta charset="utf-8">
<title>Google</title>
<style>
html { background: #fff; margin: 0 1em; }
body { font: .8125em/1.5 arial, sans-serif; text-align: center; }
h1 { font-size: 1.5em; font-weight: normal; margin: 1em 0 0; }
p#footer { color: #767676; font-size: .77em; }
p#footer a { background: url(//www.google.cn/intl/zh-CN_cn/images/cn_icp.gif) top right no-repeat; padding: 5px 20px 5px 0; }
ul { margin: 2em; padding: 0; }
li { display: inline; padding: 0 2em; }
div { -moz-border-radius: 20px; -webkit-border-radius: 20px; border: 1px solid #ccc; border-radius: 20px; margin: 2em auto 1em; max-width: 650px; min-width: 544px; }
div:hover, div:hover * { cursor: pointer; }
div:hover { border-color: #999; }
div p { margin: .5em 0 1.5em; }
img { border: 0; }
</style>
<div>
<a href="http://www.google.com.hk/webhp?hl=zh-CN&amp;sourceid=cnhp">
<img src="//www.google.cn/landing/cnexp/google-search.png" alt="Google" width="586" height="257">
</a>
<h1><a href="http://www.google.com.hk/webhp?hl=zh-CN&amp;sourceid=cnhp"><strong id="target">google.com.hk</strong></a></h1>
<p>请收藏我们的网址
</div>
<ul>
<li><a href="http://translate.google.cn/?sourceid=cnhp">翻译</a>
</ul>
<p id="footer">&copy;2011 - <a href="http://www.miibeian.gov.cn/">ICP证合字B2-20070004号</a>
<script nonce="0qYFPrpj6kdYUM03_qP12w">
var gcn=gcn||{};gcn.IS_IMAGES=(/images\.google\.cn/.exec(window.location)||window.location.hash=='#images'||window.location.hash=='images');gcn.HOMEPAGE_DEST='http://www.google.com.hk/webhp?hl=zh-CN&sourceid=cnhp';gcn.IMAGES_DEST='http://images.google.com.hk/imghp?'+'hl=zh-CN&sourceid=cnhp';gcn.DEST_URL=gcn.IS_IMAGES?gcn.IMAGES_DEST:gcn.HOMEPAGE_DEST;gcn.READABLE_HOMEPAGE_URL='google.com.hk';gcn.READABLE_IMAGES_URL='images.google.com.hk';gcn.redirectIfLocationHasQueryParams=function(){if(window.location.search&&/google\.cn/.exec(window.location)&&!/webhp/.exec(window.location)){window.location=String(window.location).replace('google.cn','google.com.hk')}}();gcn.replaceHrefsWithImagesUrl=function(){if(gcn.IS_IMAGES){var a=document.getElementsByTagName('a');for(var i=0,len=a.length;i<len;i++){if(a[i].href==gcn.HOMEPAGE_DEST){a[i].href=gcn.IMAGES_DEST}}}}();gcn.listen=function(a,e,b){if(a.addEventListener){a.addEventListener(e,b,false)}else if(a.attachEvent){var r=a.attachEvent('on'+e,b);return r}};gcn.stopDefaultAndProp=function(e){if(e&&e.preventDefault){e.preventDefault()}else if(window.event&&window.event.returnValue){window.eventReturnValue=false;return false}if(e&&e.stopPropagation){e.stopPropagation()}else if(window.event&&window.event.cancelBubble){window.event.cancelBubble=true;return false}};gcn.resetChildElements=function(a){var b=a.childNodes;for(var i=0,len=b.length;i<len;i++){gcn.listen(b[i],'click',gcn.stopDefaultAndProp)}};gcn.redirect=function(){window.location=gcn.DEST_URL};gcn.setInnerHtmlInEl=function(a){if(gcn.IS_IMAGES){var b=document.getElementById(a);if(b){b.innerHTML=b.innerHTML.replace(gcn.READABLE_HOMEPAGE_URL,gcn.READABLE_IMAGES_URL)}}};
gcn.listen(document, 'click', gcn.redirect);
gcn.setInnerHtmlInEl('target');
</script>

ISO-8859-1
utf-8
text内容为:<!DOCTYPE html>
<html lang="zh">
<meta charset="utf-8">
<title>Google</title>
<style>
html { background: #fff; margin: 0 1em; }
body { font: .8125em/1.5 arial, sans-serif; text-align: center; }
h1 { font-size: 1.5em; font-weight: normal; margin: 1em 0 0; }
p#footer { color: #767676; font-size: .77em; }
p#footer a { background: url(//www.google.cn/intl/zh-CN_cn/images/cn_icp.gif) top right no-repeat; padding: 5px 20px 5px 0; }
ul { margin: 2em; padding: 0; }
li { display: inline; padding: 0 2em; }
div { -moz-border-radius: 20px; -webkit-border-radius: 20px; border: 1px solid #ccc; border-radius: 20px; margin: 2em auto 1em; max-width: 650px; min-width: 544px; }
div:hover, div:hover * { cursor: pointer; }
div:hover { border-color: #999; }
div p { margin: .5em 0 1.5em; }
img { border: 0; }
</style>
<div>
<a href="http://www.google.com.hk/webhp?hl=zh-CN&amp;sourceid=cnhp">
<img src="//www.google.cn/landing/cnexp/google-search.png" alt="Google" width="586" height="257">
</a>
<h1><a href="http://www.google.com.hk/webhp?hl=zh-CN&amp;sourceid=cnhp"><strong id="target">google.com.hk</strong></a></h1>
<p>请收藏我们的网址
</div>
<ul>
<li><a href="http://translate.google.cn/?sourceid=cnhp">翻译</a>
</ul>
<p id="footer">&copy;2011 - <a href="http://www.miibeian.gov.cn/">ICP证合字B2-20070004号</a>
<script nonce="0qYFPrpj6kdYUM03_qP12w">
var gcn=gcn||{};gcn.IS_IMAGES=(/images\.google\.cn/.exec(window.location)||window.location.hash=='#images'||window.location.hash=='images');gcn.HOMEPAGE_DEST='http://www.google.com.hk/webhp?hl=zh-CN&sourceid=cnhp';gcn.IMAGES_DEST='http://images.google.com.hk/imghp?'+'hl=zh-CN&sourceid=cnhp';gcn.DEST_URL=gcn.IS_IMAGES?gcn.IMAGES_DEST:gcn.HOMEPAGE_DEST;gcn.READABLE_HOMEPAGE_URL='google.com.hk';gcn.READABLE_IMAGES_URL='images.google.com.hk';gcn.redirectIfLocationHasQueryParams=function(){if(window.location.search&&/google\.cn/.exec(window.location)&&!/webhp/.exec(window.location)){window.location=String(window.location).replace('google.cn','google.com.hk')}}();gcn.replaceHrefsWithImagesUrl=function(){if(gcn.IS_IMAGES){var a=document.getElementsByTagName('a');for(var i=0,len=a.length;i<len;i++){if(a[i].href==gcn.HOMEPAGE_DEST){a[i].href=gcn.IMAGES_DEST}}}}();gcn.listen=function(a,e,b){if(a.addEventListener){a.addEventListener(e,b,false)}else if(a.attachEvent){var r=a.attachEvent('on'+e,b);return r}};gcn.stopDefaultAndProp=function(e){if(e&&e.preventDefault){e.preventDefault()}else if(window.event&&window.event.returnValue){window.eventReturnValue=false;return false}if(e&&e.stopPropagation){e.stopPropagation()}else if(window.event&&window.event.cancelBubble){window.event.cancelBubble=true;return false}};gcn.resetChildElements=function(a){var b=a.childNodes;for(var i=0,len=b.length;i<len;i++){gcn.listen(b[i],'click',gcn.stopDefaultAndProp)}};gcn.redirect=function(){window.location=gcn.DEST_URL};gcn.setInnerHtmlInEl=function(a){if(gcn.IS_IMAGES){var b=document.getElementById(a);if(b){b.innerHTML=b.innerHTML.replace(gcn.READABLE_HOMEPAGE_URL,gcn.READABLE_IMAGES_URL)}}};
gcn.listen(document, 'click', gcn.redirect);
gcn.setInnerHtmlInEl('target');
</script>

 

text内容长度为:3216
content内容长度为:3244

 

3、HTML页面

import requests

from bs4 import BeautifulSoup
soup = BeautifulSoup("<!DOCTYPE html><html><head><meta charset=‘utf-8‘>\
                   <title菜鸟教程(rounoob.com)</title></head><body>\
                   <h1>我的第一标题</h1>\
                   <p id='first'>我的第一个段落。</p></body>\
                     <table border=‘1‘><tr><td>row 1,cell 1\
                   </td><td>row 1,cell 2</td></tr><tr><td>row 2,cell 1\
                   </td><td>row 2,cell 2</td></tr</table></html>")
 
print(soup.head,"36")               
print(soup.body)                
print(soup.find_all(id="first"))    
print(soup.h1.string,soup.p.string)  
 
4、中国大学排名
 
import requests
from bs4 import BeautifulSoup
import bs4
def getHTMLText(url):
    try:
        r = requests.get(url, timeout = 30)
        r.raise_for_status
        r.encoding = r.apparent_encoding
        return r.text
    except:
        return ""
 
def fillUnivList(ulist, html):
    soup = BeautifulSoup(html, "lxml")
    for tr in soup.find('tbody').children:
        if isinstance(tr, bs4.element.Tag):
            tds = tr('td')
            ulist.append([tds[0].string, tds[1].string, tds[2].string,tds[3].string])
 
def printUnivList(ulist, num):
    tplt = "{0:^6}\t{1:{4}^10}\t{2:^10}\t{3:^10}"
    print(tplt.format("排名","学校名称","省份","总分",chr(12288)))
    for i in range(num):
        u = ulist[i]
        print(tplt.format(u[0],u[1],u[2],u[3],chr(12288)))
 
def main():
    uinfo = []
    url = "http://www.zuihaodaxue.com/zuihaodaxuepaiming2017.html"
    html = getHTMLText(url)
    fillUnivList(uinfo, html)
    printUnivList(uinfo, 30)
 
main()