例1：下载网页中的图片（必须在运行代码前打开网页,如http://placekitten.com/g/300/200）：
import urllib.request response = urllib.request.urlopen("http://placekitten.com/g/300/200") cat_img = response.read() with open('cat_300_200.jpg','wb') as f: f.write(cat_img)例2：利用有道翻译进行英汉互译：右键网页选择审查元素->将Request URL的地址写入url->将From Data下的列表写入data字典->encode编码，decode译码，json将字符串转换为字典。
import urllib.request import urllib.parse import json str = input("请输入要翻译的内容")#在这里输入想要翻译的内容 url = "http://fanyi.youdao.com/translate?smartresult=dict&smartresult=rule&sessionFrom=" data = {} data['i'] = str data['from'] = 'AUTO' data['to'] = 'AUTO' data['smartresult'] = 'dict' data['client'] = 'fanyideskweb' data['salt'] = '15634369131520' data['sign'] = '172ab59aa2b0aa54c4bf49dece623a75' data['ts'] = '1563436913152' data['bv'] = 'f355c521b6e13c15aa35c72a097b7786' data['doctype'] = 'json' data['version'] = '2.1' data['keyfrom'] = 'fanyi.web' data['action'] = 'FY_BY_REALTlME' data = urllib.parse.urlencode(data).encode('utf-8') response = urllib.request.urlopen(url,data) ret = response.read().decode('utf-8') #print(ret) target = json.loads(ret) # print(target) # print(target['translateResult']) # print(target['translateResult'][0]) # print(target['translateResult'][0][0]) # print(target['translateResult'][0][0]['src']) # print(target['translateResult'][0][0]['tgt']) print("%s 的翻译结果是 %s" %(target['translateResult'][0][0]['src'],target['translateResult'][0][0]['tgt'])) >>>请输入要翻译的内容我是帅哥 >>>我是帅哥 的翻译结果是 I am a handsome boy